CWE-80
AllowedImproper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Abstraction: Variant · Status: Incomplete
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.
936 vulnerabilities reference this CWE, most recent first.
GHSA-666P-HWQX-VC2F
Vulnerability from github – Published: 2023-04-11 06:30 – Updated: 2024-04-04 03:23The SAP Application Interface (Message Dashboard) - versions AIF 703, AIFX 702, S4CORE 100, 101, SAP_BASIS 755, 756, SAP_ABA 75C, 75D, 75E, application allows the usage HTML tags. An authorized attacker can use some of the basic HTML codes such as heading, basic formatting and lists, then an attacker can inject images from the foreign domains. After successful exploitations, an attacker can cause limited impact on the confidentiality and integrity of the application.
{
"affected": [],
"aliases": [
"CVE-2023-29110"
],
"database_specific": {
"cwe_ids": [
"CWE-79",
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-11T04:16:00Z",
"severity": "MODERATE"
},
"details": "The SAP Application Interface (Message Dashboard) - versions AIF 703, AIFX 702, S4CORE 100, 101, SAP_BASIS 755, 756, SAP_ABA 75C, 75D, 75E, application allows the usage HTML tags. An authorized attacker can use some of the basic HTML codes such as heading, basic formatting and lists, then an attacker can inject images from the foreign domains. After successful exploitations, an attacker can cause limited impact on the confidentiality and integrity of the application.\n\n",
"id": "GHSA-666p-hwqx-vc2f",
"modified": "2024-04-04T03:23:40Z",
"published": "2023-04-11T06:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29110"
},
{
"type": "WEB",
"url": "https://launchpad.support.sap.com/#/notes/3113349"
},
{
"type": "WEB",
"url": "https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html"
}
],
"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-66P2-P764-G32J
Vulnerability from github – Published: 2026-03-31 06:31 – Updated: 2026-03-31 06:31The Ibtana – WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'ive' shortcode in all versions up to, and including, 1.2.5.7 due to insufficient input sanitization and output escaping on user supplied attributes. 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-2026-1834"
],
"database_specific": {
"cwe_ids": [
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-31T06:16:00Z",
"severity": "MODERATE"
},
"details": "The Ibtana \u2013 WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin\u0027s \u0027ive\u0027 shortcode in all versions up to, and including, 1.2.5.7 due to insufficient input sanitization and output escaping on user supplied attributes. 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-66p2-p764-g32j",
"modified": "2026-03-31T06:31:44Z",
"published": "2026-03-31T06:31:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1834"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/ibtana-visual-editor/tags/1.2.5.6/ive-countdown.php#L402"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/ibtana-visual-editor/tags/1.2.5.6/ive-countdown.php#L637"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/ibtana-visual-editor/tags/1.2.5.6/ive-countdown.php#L777"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset/3485257/ibtana-visual-editor"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/b6a54d91-da79-43a3-affd-e8026e342d95?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-67PX-R26W-598X
Vulnerability from github – Published: 2025-10-16 18:12 – Updated: 2025-10-16 21:54Summary
In Bagisto v2.3.7, the TinyMCE image upload functionality allows an attacker with sufficient privileges (e.g. admin) to upload a crafted HTML file containing embedded JavaScript. When viewed, the malicious code executes in the context of the admin/user’s browser.
Details
The application blocks the uploading of HTML files; however, if the backend detected that the content of the .png file is HTML or JavaScript, the file extension will be automatically converted from .png to .html. When the HTML is viewed, it will execute the JavaScript code.
PoC
Created a html file, renamed the extension to .png, and uploaded the file. It was converted to HTML file in the backend. When opened in another tab, the JavaScript code will execute.
Impact
A aalicious script is stored in HTML file and executed when the content is viewed. An attacker (with upload privilege) can target other admin users or editors who view the content, enabling session hijacking, unauthorized actions, or privilege escalation.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.3.7"
},
"package": {
"ecosystem": "Packagist",
"name": "bagisto/bagisto"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.8"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-62415"
],
"database_specific": {
"cwe_ids": [
"CWE-79",
"CWE-80",
"CWE-87"
],
"github_reviewed": true,
"github_reviewed_at": "2025-10-16T18:12:10Z",
"nvd_published_at": "2025-10-16T19:15:34Z",
"severity": "MODERATE"
},
"details": "### Summary\nIn Bagisto v2.3.7, the TinyMCE image upload functionality allows an attacker with sufficient privileges (e.g. admin) to upload a crafted HTML file containing embedded JavaScript. When viewed, the malicious code executes in the context of the admin/user\u2019s browser.\n\n### Details\nThe application blocks the uploading of HTML files; however, if the backend detected that the content of the .png file is HTML or JavaScript, the file extension will be automatically converted from .png to .html. When the HTML is viewed, it will execute the JavaScript code.\n\n### PoC\nCreated a html file, renamed the extension to .png, and uploaded the file. It was converted to HTML file in the backend. When opened in another tab, the JavaScript code will execute.\n\u003cimg width=\"1605\" height=\"702\" alt=\"image\" src=\"https://github.com/user-attachments/assets/bd9406aa-2380-464f-ac21-32d483639969\" /\u003e\n\u003cimg width=\"1358\" height=\"314\" alt=\"image\" src=\"https://github.com/user-attachments/assets/e5a64a5a-39fb-4fdb-ada9-14c4b9554803\" /\u003e\n\n### Impact\nA aalicious script is stored in HTML file and executed when the content is viewed. An attacker (with upload privilege) can target other admin users or editors who view the content, enabling session hijacking, unauthorized actions, or privilege escalation.",
"id": "GHSA-67px-r26w-598x",
"modified": "2025-10-16T21:54:25Z",
"published": "2025-10-16T18:12:10Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/bagisto/bagisto/security/advisories/GHSA-67px-r26w-598x"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-62415"
},
{
"type": "WEB",
"url": "https://github.com/bagisto/bagisto/commit/7b6b1dd639a14e7053bb82ef2f971c1f533fdfab"
},
{
"type": "PACKAGE",
"url": "https://github.com/bagisto/bagisto"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "bagisto has Cross Site Scripting (XSS) issue in TinyMCE Image Upload (HTML)"
}
GHSA-682X-VCQV-V7V6
Vulnerability from github – Published: 2024-05-03 06:30 – Updated: 2024-05-03 06:30WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in various versions up to 6.5.2 due to insufficient output escaping on the display name. 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. In addition, it also makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that have the comment block present and display the comment author's avatar.
{
"affected": [],
"aliases": [
"CVE-2024-4439"
],
"database_specific": {
"cwe_ids": [
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-03T06:15:14Z",
"severity": "HIGH"
},
"details": "WordPress Core is vulnerable to Stored Cross-Site Scripting via user display names in the Avatar block in various versions up to 6.5.2 due to insufficient output escaping on the display name. 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. In addition, it also makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that have the comment block present and display the comment author\u0027s avatar.",
"id": "GHSA-682x-vcqv-v7v6",
"modified": "2024-05-03T06:30:36Z",
"published": "2024-05-03T06:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-4439"
},
{
"type": "WEB",
"url": "https://core.trac.wordpress.org/changeset/57951/branches/6.4/src/wp-includes/blocks/avatar.php"
},
{
"type": "WEB",
"url": "https://core.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=57950%40%2F\u0026new=57950%40%2F\u0026sfp_email=\u0026sfph_mail=#file3"
},
{
"type": "WEB",
"url": "https://wordpress.org/news/2024/04/wordpress-6-5-2-maintenance-and-security-release"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/blog/2024/04/unauthenticated-stored-cross-site-scripting-vulnerability-patched-in-wordpress-core"
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/e363c09a-4381-4b3a-951c-9a0ff5669016?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-692V-783F-MG8X
Vulnerability from github – Published: 2024-07-31 16:54 – Updated: 2024-07-31 20:20Impact
By creating a conflict when another user with more rights is currently editing a page, it is possible to execute JavaScript snippets on the side of the other user, which compromises the confidentiality, integrity and availability of the whole XWiki installation.
To reproduce on a XWiki instance, a user with admin rights needs to edit a document without saving right away.
Then, as another user without any other right than edit on the specific document, change the whole content to <script>alert('XSS')</script>.
When the admin user then saves the document, a conflict popup appears. If they select "Fix each conflict individually" and see an alert displaying "XSS", then the instance is vulnerable.
Patches
This has been patched in XWiki 15.10.8 and 16.3.0RC1.
Workarounds
We're not aware of any workaround except upgrading.
References
- https://jira.xwiki.org/browse/XWIKI-21626
- https://github.com/xwiki/xwiki-platform/commit/821d43ec45e67d45a6735a0717b9b77fffc1cd9f
For more information
If you have any questions or comments about this advisory: * Open an issue in Jira XWiki.org * Email us at Security Mailing List
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.xwiki.platform:xwiki-platform-web-templates"
},
"ranges": [
{
"events": [
{
"introduced": "11.8-rc-1"
},
{
"fixed": "15.10.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.xwiki.platform:xwiki-platform-web-templates"
},
"ranges": [
{
"events": [
{
"introduced": "16.0.0-rc-1"
},
{
"fixed": "16.3.0-rc-1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-41947"
],
"database_specific": {
"cwe_ids": [
"CWE-79",
"CWE-80"
],
"github_reviewed": true,
"github_reviewed_at": "2024-07-31T16:54:36Z",
"nvd_published_at": "2024-07-31T16:15:04Z",
"severity": "CRITICAL"
},
"details": "### Impact\n\nBy creating a conflict when another user with more rights is currently editing a page, it is possible to execute JavaScript snippets on the side of the other user, which compromises the confidentiality, integrity and availability of the whole XWiki installation.\n\nTo reproduce on a XWiki instance, a user with admin rights needs to edit a document without saving right away.\nThen, as another user without any other right than edit on the specific document, change the whole content to `\u003cscript\u003ealert(\u0027XSS\u0027)\u003c/script\u003e`.\nWhen the admin user then saves the document, a conflict popup appears. If they select \"Fix each conflict individually\" and see an alert displaying \"XSS\", then the instance is vulnerable.\n\n### Patches\n\nThis has been patched in XWiki 15.10.8 and 16.3.0RC1.\n\n### Workarounds\n\nWe\u0027re not aware of any workaround except upgrading.\n\n### References\n\n* https://jira.xwiki.org/browse/XWIKI-21626\n* https://github.com/xwiki/xwiki-platform/commit/821d43ec45e67d45a6735a0717b9b77fffc1cd9f\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n* Open an issue in [Jira XWiki.org](https://jira.xwiki.org/)\n* Email us at [Security Mailing List](mailto:security@xwiki.org)",
"id": "GHSA-692v-783f-mg8x",
"modified": "2024-07-31T20:20:42Z",
"published": "2024-07-31T16:54:36Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-692v-783f-mg8x"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41947"
},
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-platform/commit/821d43ec45e67d45a6735a0717b9b77fffc1cd9f"
},
{
"type": "WEB",
"url": "https://github.com/xwiki/xwiki-platform/commit/e00e159d3737397eebd1f6ff925c1f5cb7cdec34"
},
{
"type": "PACKAGE",
"url": "https://github.com/xwiki/xwiki-platform"
},
{
"type": "WEB",
"url": "https://jira.xwiki.org/browse/XWIKI-21626"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"type": "CVSS_V4"
}
],
"summary": "XWiki Platform vulnerable to Cross-Site Scripting (XSS) through conflict resolution"
}
GHSA-69H4-R42Q-6WMV
Vulnerability from github – Published: 2024-06-04 12:31 – Updated: 2024-06-04 12:31Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in gVectors Team wpDiscuz allows Code Injection.This issue affects wpDiscuz: from n/a through 7.6.10.
{
"affected": [],
"aliases": [
"CVE-2023-46310"
],
"database_specific": {
"cwe_ids": [
"CWE-79",
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-04T10:15:10Z",
"severity": "MODERATE"
},
"details": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in gVectors Team wpDiscuz allows Code Injection.This issue affects wpDiscuz: from n/a through 7.6.10.",
"id": "GHSA-69h4-r42q-6wmv",
"modified": "2024-06-04T12:31:03Z",
"published": "2024-06-04T12:31:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-46310"
},
{
"type": "WEB",
"url": "https://patchstack.com/database/vulnerability/wpdiscuz/wordpress-wpdiscuz-plugin-7-6-10-content-injection-vulnerability?_s_id=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-69J7-C2H8-2CMF
Vulnerability from github – Published: 2025-05-21 18:33 – Updated: 2025-05-21 18:33A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface.
This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker must have valid administrative credentials.
{
"affected": [],
"aliases": [
"CVE-2025-20267"
],
"database_specific": {
"cwe_ids": [
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-21T17:15:57Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface.\n\nThis vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker must have valid administrative credentials.",
"id": "GHSA-69j7-c2h8-2cmf",
"modified": "2025-05-21T18:33:31Z",
"published": "2025-05-21T18:33:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-20267"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-stored-xss-Yff54m73"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6CV5-8FPC-P4RH
Vulnerability from github – Published: 2023-08-08 18:30 – Updated: 2024-04-04 06:42Improper input validation in Zoom Desktop Client for Windows before 5.14.7 may allow an unauthenticated user to enable an escalation of privilege via network access.
{
"affected": [],
"aliases": [
"CVE-2023-39216"
],
"database_specific": {
"cwe_ids": [
"CWE-20",
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-08-08T18:15:23Z",
"severity": "CRITICAL"
},
"details": "Improper input validation in Zoom Desktop Client for Windows before 5.14.7 may allow an unauthenticated user to enable an escalation of privilege via network access.",
"id": "GHSA-6cv5-8fpc-p4rh",
"modified": "2024-04-04T06:42:53Z",
"published": "2023-08-08T18:30:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-39216"
},
{
"type": "WEB",
"url": "https://explore.zoom.us/en/trust/security/security-bulletin"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6G9H-226R-QP89
Vulnerability from github – Published: 2023-09-27 18:30 – Updated: 2024-01-25 18:30A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager, formerly Cisco SD-WAN vManage, could allow an authenticated, remote attacker to inject HTML content.
This vulnerability is due to improper validation of user-supplied data in element fields. An attacker could exploit this vulnerability by submitting malicious content within requests and persuading a user to view a page that contains injected content. A successful exploit could allow the attacker to modify pages within the web-based management interface, possibly leading to further browser-based attacks against users of the application.
{
"affected": [],
"aliases": [
"CVE-2023-20179"
],
"database_specific": {
"cwe_ids": [
"CWE-79",
"CWE-80"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-09-27T18:15:10Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the web-based management interface of Cisco Catalyst SD-WAN Manager, formerly Cisco SD-WAN vManage, could allow an authenticated, remote attacker to inject HTML content.\n\n This vulnerability is due to improper validation of user-supplied data in element fields. An attacker could exploit this vulnerability by submitting malicious content within requests and persuading a user to view a page that contains injected content. A successful exploit could allow the attacker to modify pages within the web-based management interface, possibly leading to further browser-based attacks against users of the application.",
"id": "GHSA-6g9h-226r-qp89",
"modified": "2024-01-25T18:30:44Z",
"published": "2023-09-27T18:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-20179"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-html-3ZKh8d6x"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6GGM-PWR9-R5H2
Vulnerability from github – Published: 2026-03-16 16:39 – Updated: 2026-03-16 16:39Impact
Projects that use @leanprover/unicode-input-component are vulnerable to an XSS exploit in 0.1.9 of the package and lower. The component re-inserted text in the input element back into the input element as unescaped HTML.
Patches
The issue has been resolved in 0.2.0.
Workarounds
Replace the unicode input component with a basic HTML text field.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "@leanprover/unicode-input-component"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-32732"
],
"database_specific": {
"cwe_ids": [
"CWE-80"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-16T16:39:55Z",
"nvd_published_at": "2026-03-16T14:19:43Z",
"severity": "LOW"
},
"details": "### Impact\nProjects that use [@leanprover/unicode-input-component](https://www.npmjs.com/package/@leanprover/unicode-input-component) are vulnerable to an XSS exploit in 0.1.9 of the package and lower. \nThe component re-inserted text in the input element back into the input element as unescaped HTML.\n\n### Patches\nThe issue has been resolved in 0.2.0.\n\n### Workarounds\nReplace the unicode input component with a basic HTML text field.",
"id": "GHSA-6ggm-pwr9-r5h2",
"modified": "2026-03-16T16:39:55Z",
"published": "2026-03-16T16:39:55Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/leanprover/vscode-lean4/security/advisories/GHSA-6ggm-pwr9-r5h2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32732"
},
{
"type": "WEB",
"url": "https://github.com/leanprover/vscode-lean4/pull/735"
},
{
"type": "PACKAGE",
"url": "https://github.com/leanprover/vscode-lean4"
},
{
"type": "WEB",
"url": "https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/weird.20behavior.20in.20loogle.20searchbar/near/578502003"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "XSS in @leanprover/unicode-input-component"
}
Mitigation
Carefully check each input parameter against a rigorous positive specification (allowlist) defining the specific characters and format allowed. All input should be neutralized, 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. We often encounter 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.
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.
CAPEC-18: XSS Targeting Non-Script Elements
This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an adversary to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote adversary to collect and interpret the output of said attack.
CAPEC-193: PHP Remote File Inclusion
In this pattern the adversary is able to load and execute arbitrary code remotely available from the application. This is usually accomplished through an insecurely configured PHP runtime environment and an improperly sanitized "include" or "require" call, which the user can then control to point to any web-accessible file. This allows adversaries to hijack the targeted application and force it to execute their own instructions.
CAPEC-32: XSS Through HTTP Query Strings
An adversary embeds malicious script code in the parameters of an HTTP query string and convinces a victim to submit the HTTP request that contains the query string to a vulnerable web application. The web application then procedes to use the values parameters without properly validation them first and generates the HTML code that will be executed by the victim's browser.
CAPEC-86: XSS Through HTTP Headers
An adversary exploits web applications that generate web content, such as links in a HTML page, based on unvalidated or improperly validated data submitted by other actors. XSS in HTTP Headers attacks target the HTTP headers which are hidden from most users and may not be validated by web applications.