CWE-79
AllowedImproper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Abstraction: Base · Status: Stable
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
68799 vulnerabilities reference this CWE, most recent first.
GHSA-87QX-G5WG-MWMJ
Vulnerability from github – Published: 2022-05-14 01:01 – Updated: 2023-03-10 02:34RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute that can result in XSS. This attack requires the victim to browse to a malicious gem on a vulnerable gem server. This vulnerability is fixed in 2.7.6.
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "rubygems-update"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.jruby:jruby-stdlib"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.1.16.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-1000078"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2023-03-10T02:34:50Z",
"nvd_published_at": "2018-03-13T15:29:00Z",
"severity": "MODERATE"
},
"details": "RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute that can result in XSS. This attack requires the victim to browse to a malicious gem on a vulnerable gem server. This vulnerability is fixed in 2.7.6.",
"id": "GHSA-87qx-g5wg-mwmj",
"modified": "2023-03-10T02:34:50Z",
"published": "2022-05-14T01:01:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000078"
},
{
"type": "WEB",
"url": "https://github.com/jruby/jruby/commit/0b06b48ab4432237ce5fc1bef47f2c6bcf7843f7"
},
{
"type": "WEB",
"url": "https://github.com/rubygems/rubygems/commit/5971b486d4dbb2bad5d3445b3801c456eb0ce183"
},
{
"type": "WEB",
"url": "https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4259"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4219"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3621-1"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/05/msg00028.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2020:0663"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2020:0591"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2020:0542"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2019:2028"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3731"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3730"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:3729"
},
{
"type": "WEB",
"url": "http://blog.rubygems.org/2018/02/15/2.7.6-released.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "RubyGems Cross-site Scripting vulnerability"
}
GHSA-87R3-4GC8-F897
Vulnerability from github – Published: 2022-05-24 17:11 – Updated: 2023-09-26 20:40Dolibarr ERP/CRM before 10.0.3 allows XSS because uploaded HTML documents are served as text/html despite being renamed to .noexe files.
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "dolibarr/dolibarr"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "10.0.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-19210"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2023-07-18T23:43:43Z",
"nvd_published_at": "2020-03-16T15:15:00Z",
"severity": "MODERATE"
},
"details": "Dolibarr ERP/CRM before 10.0.3 allows XSS because uploaded HTML documents are served as text/html despite being renamed to .noexe files.",
"id": "GHSA-87r3-4gc8-f897",
"modified": "2023-09-26T20:40:35Z",
"published": "2022-05-24T17:11:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19210"
},
{
"type": "PACKAGE",
"url": "https://github.com/Dolibarr/dolibarr"
},
{
"type": "WEB",
"url": "https://herolab.usd.de/security-advisories/usd-2019-0052"
},
{
"type": "WEB",
"url": "https://www.dolibarr.org/forum/dolibarr-changelogs"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Dolibarr ERP and CRM contain XSS Vulnerability"
}
GHSA-87R7-GX2X-86H9
Vulnerability from github – Published: 2024-12-05 12:31 – Updated: 2024-12-05 12:31The NewsMunch theme for WordPress is vulnerable to Stored Cross-Site Scripting via a malicious display name in all versions up to, and including, 1.0.35 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
{
"affected": [],
"aliases": [
"CVE-2024-10848"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-05T10:31:39Z",
"severity": "MODERATE"
},
"details": "The NewsMunch theme for WordPress is vulnerable to Stored Cross-Site Scripting via a malicious display name in all versions up to, and including, 1.0.35 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.",
"id": "GHSA-87r7-gx2x-86h9",
"modified": "2024-12-05T12:31:28Z",
"published": "2024-12-05T12:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-10848"
},
{
"type": "WEB",
"url": "https://themes.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=250663%40newsmunch\u0026new=250663%40newsmunch\u0026sfp_email=\u0026sfph_mail="
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1a2b0ff4-9471-4fd0-ac1a-ed5b7b4af4ff?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-87R8-H45F-65Q2
Vulnerability from github – Published: 2023-07-06 15:30 – Updated: 2024-04-04 05:28Cross Site Scripting (XSS) vulnerability in username field in /src/chatbotapp/chatWindow.java in Payatu ChatEngine v.1.0, allows attackers to execute arbitrary code.
{
"affected": [],
"aliases": [
"CVE-2023-30322"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-06T15:15:15Z",
"severity": "MODERATE"
},
"details": "Cross Site Scripting (XSS) vulnerability in username field in /src/chatbotapp/chatWindow.java in Payatu ChatEngine v.1.0, allows attackers to execute arbitrary code.",
"id": "GHSA-87r8-h45f-65q2",
"modified": "2024-04-04T05:28:32Z",
"published": "2023-07-06T15:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-30322"
},
{
"type": "WEB",
"url": "https://github.com/wliang6/ChatEngine/blob/master/src/chatbotapp/chatWindow.java#L71:L81"
},
{
"type": "WEB",
"url": "https://payatu.com/advisory/cross-site-scripting-xss-in-username-field-in-chatwindow-functionality-in-chatengine-1-0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-87RP-RPX5-R7J3
Vulnerability from github – Published: 2022-05-14 01:58 – Updated: 2022-05-14 01:58The $args variable in addons/mediapool/pages/index.php in REDAXO 5.6.2 is not effectively filtered, because names are not restricted (only values are restricted). The attacker can insert XSS payloads via an index.php?page=mediapool/media&opener_input_field=&args[ substring.
{
"affected": [],
"aliases": [
"CVE-2018-17830"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-10-01T08:29:00Z",
"severity": "MODERATE"
},
"details": "The $args variable in addons/mediapool/pages/index.php in REDAXO 5.6.2 is not effectively filtered, because names are not restricted (only values are restricted). The attacker can insert XSS payloads via an index.php?page=mediapool/media\u0026opener_input_field=\u0026args[ substring.",
"id": "GHSA-87rp-rpx5-r7j3",
"modified": "2022-05-14T01:58:50Z",
"published": "2022-05-14T01:58:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17830"
},
{
"type": "WEB",
"url": "https://github.com/redaxo/redaxo4/issues/421"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-87RW-C4JP-4GJV
Vulnerability from github – Published: 2025-07-04 12:30 – Updated: 2026-04-01 18:35Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ValvePress Rankie allows Reflected XSS. This issue affects Rankie: from n/a through 1.8.2.
{
"affected": [],
"aliases": [
"CVE-2025-39487"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-04T12:15:28Z",
"severity": "HIGH"
},
"details": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in ValvePress Rankie allows Reflected XSS. This issue affects Rankie: from n/a through 1.8.2.",
"id": "GHSA-87rw-c4jp-4gjv",
"modified": "2026-04-01T18:35:45Z",
"published": "2025-07-04T12:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39487"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/wordpress/plugin/valvepress-rankie/vulnerability/wordpress-rankie-plugin-1-8-2-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-87V3-4CFP-CM76
Vulnerability from github – Published: 2026-03-18 16:10 – Updated: 2026-03-18 16:10Summary
The SVG schema plugin in @pdfme/schemas renders user-supplied SVG content using container.innerHTML = value without any sanitization, enabling arbitrary JavaScript execution in the user's browser.
Details
In packages/schemas/src/graphics/svg.ts, line 87, the SVG schema's ui renderer assigns raw SVG markup directly to innerHTML when in viewer mode or form mode with readOnly: true:
// svg.ts, line 81-94 (non-editable rendering path)
} else {
if (!value) return;
if (!isValidSVG(value)) {
rootElement.appendChild(createErrorElm());
return;
}
container.innerHTML = value; // <-- VULNERABLE: unsanitized SVG injected into DOM
const svgElement = container.childNodes[0];
if (svgElement instanceof SVGElement) {
svgElement.setAttribute('width', '100%');
svgElement.setAttribute('height', '100%');
rootElement.appendChild(container);
}
}
The isValidSVG() function (lines 11-37) only validates that the string contains <svg and </svg> tags and passes DOMParser well-formedness checks. It does NOT strip or block:
- <script> tags embedded in SVG
- Event handler attributes (onload, onerror, onclick, etc.)
- <foreignObject> elements containing HTML with event handlers
- <animate> / <set> elements with onbegin / onend handlers
- SVG <use> elements referencing malicious external resources
All of these are valid SVG and pass isValidSVG(), but execute JavaScript when inserted via innerHTML.
Attack Vectors
1. Malicious Template (readOnly SVG schema)
An attacker crafts a template JSON with a readOnly SVG schema containing a malicious content value. When loaded into the pdfme Form or Viewer component, the SVG executes JavaScript.
2. Application-Supplied Inputs + Viewer
If an application uses the pdfme Viewer component and passes user-controlled data as inputs for a non-readOnly SVG schema, the attacker's SVG flows directly to innerHTML.
Proof of Concept
Loading the following template into a pdfme Form or Viewer component triggers JavaScript execution:
{
"basePdf": { "width": 210, "height": 297, "padding": [20, 20, 20, 20] },
"schemas": [[
{
"name": "malicious_svg",
"type": "svg",
"content": "<svg xmlns='http://www.w3.org/2000/svg' onload='alert(document.domain)'><rect width='100' height='100' fill='red'/></svg>",
"readOnly": true,
"position": { "x": 20, "y": 20 },
"width": 80,
"height": 40
}
]]
}
Additional payloads that bypass isValidSVG() and execute JavaScript:
<!-- Via foreignObject -->
<svg xmlns="http://www.w3.org/2000/svg"><foreignObject width="200" height="60"><body xmlns="http://www.w3.org/1999/xhtml"><img src="x" onerror="alert(1)"/></body></foreignObject></svg>
<!-- Via animate onbegin -->
<svg xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100"><animate attributeName="x" values="0" dur="0.001s" onbegin="alert(1)"/></rect></svg>
Impact
An attacker who can supply a malicious template (via file upload, shared template URL, multi-tenant template storage, or updateTemplate() API) can execute arbitrary JavaScript in the context of any user who views or fills the template. This enables:
- Session hijacking via cookie/token theft
- Keylogging of form inputs (including sensitive data being entered into PDF forms)
- Phishing attacks by modifying the rendered page
- Data exfiltration from the application
The attack is particularly concerning for multi-tenant SaaS applications using pdfme where templates may be user-supplied.
Suggested Fix
Sanitize SVG content before DOM insertion using DOMPurify or a similar library:
import DOMPurify from 'dompurify';
// Replace line 87:
container.innerHTML = DOMPurify.sanitize(value, { USE_PROFILES: { svg: true } });
Alternatively, parse the SVG via DOMParser, strip all script elements and event handler attributes, then append the sanitized DOM nodes.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 5.5.8"
},
"package": {
"ecosystem": "npm",
"name": "@pdfme/schemas"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.5.9"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-18T16:10:26Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "## Summary\n\nThe SVG schema plugin in `@pdfme/schemas` renders user-supplied SVG content using `container.innerHTML = value` without any sanitization, enabling arbitrary JavaScript execution in the user\u0027s browser.\n\n## Details\n\nIn `packages/schemas/src/graphics/svg.ts`, line 87, the SVG schema\u0027s `ui` renderer assigns raw SVG markup directly to `innerHTML` when in viewer mode or form mode with `readOnly: true`:\n\n```typescript\n// svg.ts, line 81-94 (non-editable rendering path)\n} else {\n if (!value) return;\n if (!isValidSVG(value)) {\n rootElement.appendChild(createErrorElm());\n return;\n }\n container.innerHTML = value; // \u003c-- VULNERABLE: unsanitized SVG injected into DOM\n const svgElement = container.childNodes[0];\n if (svgElement instanceof SVGElement) {\n svgElement.setAttribute(\u0027width\u0027, \u0027100%\u0027);\n svgElement.setAttribute(\u0027height\u0027, \u0027100%\u0027);\n rootElement.appendChild(container);\n }\n}\n```\n\nThe `isValidSVG()` function (lines 11-37) only validates that the string contains `\u003csvg` and `\u003c/svg\u003e` tags and passes `DOMParser` well-formedness checks. It does NOT strip or block:\n- `\u003cscript\u003e` tags embedded in SVG\n- Event handler attributes (`onload`, `onerror`, `onclick`, etc.)\n- `\u003cforeignObject\u003e` elements containing HTML with event handlers\n- `\u003canimate\u003e` / `\u003cset\u003e` elements with `onbegin` / `onend` handlers\n- SVG `\u003cuse\u003e` elements referencing malicious external resources\n\nAll of these are valid SVG and pass `isValidSVG()`, but execute JavaScript when inserted via `innerHTML`.\n\n## Attack Vectors\n\n### 1. Malicious Template (readOnly SVG schema)\nAn attacker crafts a template JSON with a readOnly SVG schema containing a malicious `content` value. When loaded into the pdfme Form or Viewer component, the SVG executes JavaScript.\n\n### 2. Application-Supplied Inputs + Viewer\nIf an application uses the pdfme Viewer component and passes user-controlled data as inputs for a non-readOnly SVG schema, the attacker\u0027s SVG flows directly to `innerHTML`.\n\n## Proof of Concept\n\nLoading the following template into a pdfme Form or Viewer component triggers JavaScript execution:\n\n```json\n{\n \"basePdf\": { \"width\": 210, \"height\": 297, \"padding\": [20, 20, 20, 20] },\n \"schemas\": [[\n {\n \"name\": \"malicious_svg\",\n \"type\": \"svg\",\n \"content\": \"\u003csvg xmlns=\u0027http://www.w3.org/2000/svg\u0027 onload=\u0027alert(document.domain)\u0027\u003e\u003crect width=\u0027100\u0027 height=\u0027100\u0027 fill=\u0027red\u0027/\u003e\u003c/svg\u003e\",\n \"readOnly\": true,\n \"position\": { \"x\": 20, \"y\": 20 },\n \"width\": 80,\n \"height\": 40\n }\n ]]\n}\n```\n\nAdditional payloads that bypass `isValidSVG()` and execute JavaScript:\n\n```svg\n\u003c!-- Via foreignObject --\u003e\n\u003csvg xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cforeignObject width=\"200\" height=\"60\"\u003e\u003cbody xmlns=\"http://www.w3.org/1999/xhtml\"\u003e\u003cimg src=\"x\" onerror=\"alert(1)\"/\u003e\u003c/body\u003e\u003c/foreignObject\u003e\u003c/svg\u003e\n\n\u003c!-- Via animate onbegin --\u003e\n\u003csvg xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003crect width=\"100\" height=\"100\"\u003e\u003canimate attributeName=\"x\" values=\"0\" dur=\"0.001s\" onbegin=\"alert(1)\"/\u003e\u003c/rect\u003e\u003c/svg\u003e\n```\n\n## Impact\n\nAn attacker who can supply a malicious template (via file upload, shared template URL, multi-tenant template storage, or `updateTemplate()` API) can execute arbitrary JavaScript in the context of any user who views or fills the template. This enables:\n- Session hijacking via cookie/token theft\n- Keylogging of form inputs (including sensitive data being entered into PDF forms)\n- Phishing attacks by modifying the rendered page\n- Data exfiltration from the application\n\nThe attack is particularly concerning for multi-tenant SaaS applications using pdfme where templates may be user-supplied.\n\n## Suggested Fix\n\nSanitize SVG content before DOM insertion using DOMPurify or a similar library:\n\n```typescript\nimport DOMPurify from \u0027dompurify\u0027;\n\n// Replace line 87:\ncontainer.innerHTML = DOMPurify.sanitize(value, { USE_PROFILES: { svg: true } });\n```\n\nAlternatively, parse the SVG via `DOMParser`, strip all script elements and event handler attributes, then append the sanitized DOM nodes.",
"id": "GHSA-87v3-4cfp-cm76",
"modified": "2026-03-18T16:10:26Z",
"published": "2026-03-18T16:10:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/pdfme/pdfme/security/advisories/GHSA-87v3-4cfp-cm76"
},
{
"type": "PACKAGE",
"url": "https://github.com/pdfme/pdfme"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Cross-Site Scripting (XSS) via SVG Schema innerHTML Injection in @pdfme/schemas"
}
GHSA-87V8-5RXX-33VV
Vulnerability from github – Published: 2022-04-29 01:27 – Updated: 2022-04-29 01:27Cross-site scripting (XSS) vulnerability in guestbook.cgi in ftls.org Guestbook 1.1 allows remote attackers to inject arbitrary web script or HTML via the (1) comment, (2) name, or (3) title field.
{
"affected": [],
"aliases": [
"CVE-2003-1348"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2003-12-31T05:00:00Z",
"severity": "MODERATE"
},
"details": "Cross-site scripting (XSS) vulnerability in guestbook.cgi in ftls.org Guestbook 1.1 allows remote attackers to inject arbitrary web script or HTML via the (1) comment, (2) name, or (3) title field.",
"id": "GHSA-87v8-5rxx-33vv",
"modified": "2022-04-29T01:27:55Z",
"published": "2022-04-29T01:27:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2003-1348"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/11155"
},
{
"type": "WEB",
"url": "http://securityreason.com/securityalert/3227"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/308312"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/6686"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-87VP-MG4J-R3V3
Vulnerability from github – Published: 2022-05-24 16:54 – Updated: 2024-04-04 01:46openITCOCKPIT before 3.7.1 has reflected XSS, aka RVID 3-445b21.
{
"affected": [],
"aliases": [
"CVE-2019-15492"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-08-23T13:15:00Z",
"severity": "MODERATE"
},
"details": "openITCOCKPIT before 3.7.1 has reflected XSS, aka RVID 3-445b21.",
"id": "GHSA-87vp-mg4j-r3v3",
"modified": "2024-04-04T01:46:51Z",
"published": "2022-05-24T16:54:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15492"
},
{
"type": "WEB",
"url": "https://github.com/it-novum/openITCOCKPIT/releases/tag/openITCOCKPIT-3.7.1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-87VP-WHG8-8RCQ
Vulnerability from github – Published: 2026-03-13 21:31 – Updated: 2026-03-16 15:30Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Icon List Block icon-list-block allows Stored XSS.This issue affects Icon List Block: from n/a through <= 1.2.3.
{
"affected": [],
"aliases": [
"CVE-2026-32359"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-13T19:54:49Z",
"severity": "MODERATE"
},
"details": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in bPlugins Icon List Block icon-list-block allows Stored XSS.This issue affects Icon List Block: from n/a through \u003c= 1.2.3.",
"id": "GHSA-87vp-whg8-8rcq",
"modified": "2026-03-16T15:30:35Z",
"published": "2026-03-13T21:31:48Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32359"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/Wordpress/Plugin/icon-list-block/vulnerability/wordpress-icon-list-block-plugin-1-2-3-cross-site-scripting-xss-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-4
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
- Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
Mitigation
- Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
- For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
- Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
- etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
- Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
- HTML body
- Element attributes (such as src="XYZ")
- URIs
- JavaScript sections
- Cascading Style Sheets and style property
Mitigation MIT-6
Strategy: Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
Mitigation MIT-15
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
Mitigation MIT-27
Strategy: Parameterization
If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.
Mitigation MIT-30.1
Strategy: Output Encoding
- Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
- The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Mitigation MIT-43
With Struts, write all data from form beans with the bean's filter attribute set to true.
Mitigation MIT-31
Strategy: Attack Surface Reduction
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- When dynamically constructing web pages, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. All input should be validated and cleansed, not just parameters that the user is supposed to specify, but all data in the request, including hidden fields, cookies, headers, the URL itself, and so forth. A common mistake that leads to continuing XSS vulnerabilities is to validate only fields that are expected to be redisplayed by the site. It is common to see data from the request that is reflected by the application server or the application that the development team did not anticipate. Also, a field that is not currently reflected may be used by a future developer. Therefore, validating ALL parts of the HTTP request is recommended.
- Note that proper output encoding, escaping, and quoting is the most effective solution for preventing XSS, although input validation may provide some defense-in-depth. This is because it effectively limits what will appear in output. Input validation will not always prevent XSS, especially if you are required to support free-form text fields that could contain arbitrary characters. For example, in a chat application, the heart emoticon ("<3") would likely pass the validation step, since it is commonly used. However, it cannot be directly inserted into the web page because it contains the "<" character, which would need to be escaped or otherwise handled. In this case, stripping the "<" might reduce the risk of XSS, but it would produce incorrect behavior because the emoticon would not be recorded. This might seem to be a minor inconvenience, but it would be more important in a mathematical forum that wants to represent inequalities.
- Even if you make a mistake in your validation (such as forgetting one out of 100 input fields), appropriate encoding is still likely to protect you from injection-based attacks. As long as it is not done in isolation, input validation is still a useful technique, since it may significantly reduce your attack surface, allow you to detect some attacks, and provide other security benefits that proper encoding does not address.
- Ensure that you perform input validation at well-defined interfaces within the application. This will help protect the application even if a component is reused or moved elsewhere.
Mitigation MIT-21
Strategy: Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
Mitigation MIT-29
Strategy: Firewall
Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
Mitigation MIT-16
Strategy: Environment Hardening
When using PHP, configure the application so that it does not use register_globals. During implementation, develop the application so that it does not rely on this feature, but be wary of implementing a register_globals emulation that is subject to weaknesses such as CWE-95, CWE-621, and similar issues.
CAPEC-209: XSS Using MIME Type Mismatch
An adversary creates a file with scripting content but where the specified MIME type of the file is such that scripting is not expected. The adversary tricks the victim into accessing a URL that responds with the script file. Some browsers will detect that the specified MIME type of the file does not match the actual type of its content and will automatically switch to using an interpreter for the real content type. If the browser does not invoke script filters before doing this, the adversary's script may run on the target unsanitized, possibly revealing the victim's cookies or executing arbitrary script in their browser.
CAPEC-588: DOM-Based XSS
This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is inserted into the client-side HTML being parsed by a web browser. Content served by a vulnerable web application includes script code used to manipulate the Document Object Model (DOM). This script code either does not properly validate input, or does not perform proper output encoding, thus creating an opportunity for an adversary to inject a malicious script launch a XSS attack. A key distinction between other XSS attacks and DOM-based attacks is that in other XSS attacks, the malicious script runs when the vulnerable web page is initially loaded, while a DOM-based attack executes sometime after the page loads. Another distinction of DOM-based attacks is that in some cases, the malicious script is never sent to the vulnerable web server at all. An attack like this is guaranteed to bypass any server-side filtering attempts to protect users.
CAPEC-591: Reflected XSS
This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is "reflected" off a vulnerable web application and then executed by a victim's browser. The process starts with an adversary delivering a malicious script to a victim and convincing the victim to send the script to the vulnerable web application.
CAPEC-592: Stored XSS
An adversary utilizes a form of Cross-site Scripting (XSS) where a malicious script is persistently "stored" within the data storage of a vulnerable web application as valid input.
CAPEC-63: Cross-Site Scripting (XSS)
An adversary embeds malicious scripts in content that will be served to web browsers. The goal of the attack is for the target software, the client-side browser, to execute the script with the users' privilege level. An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute code and scripts. Web browsers, for example, have some simple security controls in place, but if a remote attacker is allowed to execute scripts (through injecting them in to user-generated content like bulletin boards) then these controls may be bypassed. Further, these attacks are very difficult for an end user to detect.
CAPEC-85: AJAX Footprinting
This attack utilizes the frequent client-server roundtrips in Ajax conversation to scan a system. While Ajax does not open up new vulnerabilities per se, it does optimize them from an attacker point of view. A common first step for an attacker is to footprint the target environment to understand what attacks will work. Since footprinting relies on enumeration, the conversational pattern of rapid, multiple requests and responses that are typical in Ajax applications enable an attacker to look for many vulnerabilities, well-known ports, network locations and so on. The knowledge gained through Ajax fingerprinting can be used to support other attacks, such as XSS.