CVE-2026-49279 (GCVE-0-2026-49279)

Vulnerability from cvelistv5 – Published: 2026-07-15 20:57 – Updated: 2026-07-18 02:22

Title

WWBN AVideo: Stored XSS via autoEvalCodeOnHTML Bypass in MessageSQLite WebSocket Handler (CVE-2026-43874 Bypass)

Summary

WWBN AVideo is an open source video platform. Versions 29.0 and below contain a Stored XSS vulnerability through the autoEvalCodeOnHTML parameter in the MessageSQLite WebSocket Handler. The MessageSQLite.php handler only strips autoEvalCodeOnHTML from $json['msg'], but msgToResourceId() reads from $msg['json'] with higher priority. An attacker can place the XSS payload in the json key instead of msg, bypassing the sanitization entirely. An authenticated attacker can execute arbitrary JavaScript in any connected user's browser session via the WebSocket messaging system, stealing session cookies and authentication tokens, taking over accounts through session hijacking, and chaining with CSRF to perform admin actions on the victim's behalf, in the default SQLite WebSocket backend configuration. This issue has a patch that has yet to be officially released, see https://github.com/WWBN/AVideo/commit/3e0b3ce2bfa766183ff0ae227439394db57b1a23.

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-18 02:21 UTC

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/3e0b3ce2bfa…	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-2026-49279

Vulnerability from fkie_nvd - Published: 2026-07-15 22:16 - Updated: 2026-07-18 03:16

Severity

7.7 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/WWBN/AVideo/commit/3e0b3ce2bfa766183ff0ae227439394db57b1a23
	security-advisories@github.com	https://github.com/WWBN/AVideo/security/advisories/GHSA-2fhx-q92v-5fhv
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/WWBN/AVideo/security/advisories/GHSA-2fhx-q92v-5fhv

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "AVideo",
          "vendor": "WWBN",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 29.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "WWBN AVideo is an open source video platform. Versions 29.0 and below contain a Stored XSS vulnerability through the autoEvalCodeOnHTML parameter in the MessageSQLite WebSocket Handler. The MessageSQLite.php handler only strips autoEvalCodeOnHTML from $json[\u0027msg\u0027], but msgToResourceId() reads from $msg[\u0027json\u0027] with higher priority. An attacker can place the XSS payload in the json key instead of msg, bypassing the sanitization entirely. An authenticated attacker can execute arbitrary JavaScript in any connected user\u0027s browser session via the WebSocket messaging system, stealing session cookies and authentication tokens, taking over accounts through session hijacking, and chaining with CSRF to perform admin actions on the victim\u0027s behalf, in the default SQLite WebSocket backend configuration. This issue has a patch that has yet to be officially released, see https://github.com/WWBN/AVideo/commit/3e0b3ce2bfa766183ff0ae227439394db57b1a23."
    }
  ],
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  "lastModified": "2026-07-18T03:16:36.547",
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          "exploitMaturity": "NOT_DEFINED",
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}

GHSA-2FHX-Q92V-5FHV

Vulnerability from github – Published: 2026-06-04 18:55 – Updated: 2026-06-04 18:55

Summary

WWBN AVideo: Stored XSS via autoEvalCodeOnHTML Bypass in MessageSQLite WebSocket Handler (CVE-2026-43874 Bypass)

Details

AVideo: Stored XSS via `autoEvalCodeOnHTML` in MessageSQLite WebSocket Handler

Summary

AVideo has a stored XSS vulnerability in the WebSocket messaging system. The MessageSQLite.php handler only strips autoEvalCodeOnHTML from $json['msg'], but msgToResourceId() reads from $msg['json'] with higher priority. An attacker can place the XSS payload in the json key instead of msg, bypassing the sanitization entirely.

Affected Versions

AVideo <= latest

Vulnerability Details

Root Cause: Shallow sanitization only covers `$json['msg']`

plugin/YPTSocket/MessageSQLite.php lines 268-271 — the incomplete fix:

if (empty($msgObj->isCommandLineInterface) && ($msgObj->sentFrom ?? '') !== 'php') {
    if (is_array($json['msg'] ?? null)) {
        unset($json['msg']['autoEvalCodeOnHTML']);  // Only strips from $json['msg']
    }
}

plugin/YPTSocket/MessageSQLite.php lines 361-367 — the bypass via msgToResourceId():

if (!empty($msg['json'])) {
    $obj['msg'] = $msg['json'];       // $msg['json']['autoEvalCodeOnHTML'] is NEVER stripped
} else if (!empty($msg['msg'])) {
    $obj['msg'] = $msg['msg'];        // Only this path was sanitized
} else {
    $obj['msg'] = $msg;
}

Compare with the correctly patched Message.php (lines 254-256):

$json = removeAutoEvalCodeOnHTMLRecursive($json);  // Strips from ALL nested paths

And MessageSQLiteV2.php (lines 302-303):

$json = removeAutoEvalCodeOnHTMLRecursive($json);  // Same recursive fix

MessageSQLite.php does not call removeAutoEvalCodeOnHTMLRecursive() at all.

Attack Chain

Attacker sends a WebSocket message with autoEvalCodeOnHTML in the json key instead of msg
The fix at line 268-271 only checks $json['msg'] — the json key is untouched
msgToResourceId() reads $msg['json'] first (line 361) because !empty($msg['json']) is true
The payload is delivered to the victim's WebSocket client and evaluated via autoEvalCodeOnHTML

Proof of Concept

// Connect to AVideo WebSocket as authenticated user
const ws = new WebSocket('wss://TARGET/plugin/YPTSocket/server.php?token=USER_TOKEN');

ws.onopen = () => {
  ws.send(JSON.stringify({
    msg: "Hello",                               // sanitized path — decoy
    json: {autoEvalCodeOnHTML: "alert('XSS')"},  // unsanitized path — payload
    to_users_id: VICTIM_USER_ID,
    resourceId: RESOURCE_ID
  }));
};
// Victim's client evaluates alert('XSS') via autoEvalCodeOnHTML mechanism

Impact

An authenticated attacker can:

Execute arbitrary JavaScript in any connected user's browser session via the WebSocket messaging system
Steal session cookies and authentication tokens
Perform account takeover via session hijacking
Chain with CSRF to execute admin actions on behalf of the victim

The vulnerability affects the default SQLite WebSocket backend configuration.

Suggested Remediation

Apply removeAutoEvalCodeOnHTMLRecursive() in MessageSQLite.php, consistent with Message.php and MessageSQLiteV2.php:

// Before (vulnerable — shallow strip):
if (is_array($json['msg'] ?? null)) {
    unset($json['msg']['autoEvalCodeOnHTML']);
}

// After (fixed — recursive strip):
$json = removeAutoEvalCodeOnHTMLRecursive($json);

Severity

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "wwbn/avideo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "29.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49279"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-04T18:55:04Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "# AVideo: Stored XSS via `autoEvalCodeOnHTML` in MessageSQLite WebSocket Handler\n\n## Summary\n\nAVideo has a stored XSS vulnerability in the WebSocket messaging system. The `MessageSQLite.php` handler only strips `autoEvalCodeOnHTML` from `$json[\u0027msg\u0027]`, but `msgToResourceId()` reads from `$msg[\u0027json\u0027]` with higher priority. An attacker can place the XSS payload in the `json` key instead of `msg`, bypassing the sanitization entirely.\n\n\n## Affected Versions\n\nAVideo \u003c= latest\n\n## Vulnerability Details\n\n### Root Cause: Shallow sanitization only covers `$json[\u0027msg\u0027]`\n\n`plugin/YPTSocket/MessageSQLite.php` lines 268-271 \u2014 the incomplete fix:\n\n```php\nif (empty($msgObj-\u003eisCommandLineInterface) \u0026\u0026 ($msgObj-\u003esentFrom ?? \u0027\u0027) !== \u0027php\u0027) {\n    if (is_array($json[\u0027msg\u0027] ?? null)) {\n        unset($json[\u0027msg\u0027][\u0027autoEvalCodeOnHTML\u0027]);  // Only strips from $json[\u0027msg\u0027]\n    }\n}\n```\n\n`plugin/YPTSocket/MessageSQLite.php` lines 361-367 \u2014 the bypass via `msgToResourceId()`:\n\n```php\nif (!empty($msg[\u0027json\u0027])) {\n    $obj[\u0027msg\u0027] = $msg[\u0027json\u0027];       // $msg[\u0027json\u0027][\u0027autoEvalCodeOnHTML\u0027] is NEVER stripped\n} else if (!empty($msg[\u0027msg\u0027])) {\n    $obj[\u0027msg\u0027] = $msg[\u0027msg\u0027];        // Only this path was sanitized\n} else {\n    $obj[\u0027msg\u0027] = $msg;\n}\n```\n\nCompare with the correctly patched `Message.php` (lines 254-256):\n\n```php\n$json = removeAutoEvalCodeOnHTMLRecursive($json);  // Strips from ALL nested paths\n```\n\nAnd `MessageSQLiteV2.php` (lines 302-303):\n\n```php\n$json = removeAutoEvalCodeOnHTMLRecursive($json);  // Same recursive fix\n```\n\n`MessageSQLite.php` does not call `removeAutoEvalCodeOnHTMLRecursive()` at all.\n\n### Attack Chain\n\n- Attacker sends a WebSocket message with `autoEvalCodeOnHTML` in the `json` key instead of `msg`\n- The fix at line 268-271 only checks `$json[\u0027msg\u0027]` \u2014 the `json` key is untouched\n- `msgToResourceId()` reads `$msg[\u0027json\u0027]` first (line 361) because `!empty($msg[\u0027json\u0027])` is true\n- The payload is delivered to the victim\u0027s WebSocket client and evaluated via `autoEvalCodeOnHTML`\n\n## Proof of Concept\n\n```javascript\n// Connect to AVideo WebSocket as authenticated user\nconst ws = new WebSocket(\u0027wss://TARGET/plugin/YPTSocket/server.php?token=USER_TOKEN\u0027);\n\nws.onopen = () =\u003e {\n  ws.send(JSON.stringify({\n    msg: \"Hello\",                               // sanitized path \u2014 decoy\n    json: {autoEvalCodeOnHTML: \"alert(\u0027XSS\u0027)\"},  // unsanitized path \u2014 payload\n    to_users_id: VICTIM_USER_ID,\n    resourceId: RESOURCE_ID\n  }));\n};\n// Victim\u0027s client evaluates alert(\u0027XSS\u0027) via autoEvalCodeOnHTML mechanism\n```\n\n## Impact\n\nAn authenticated attacker can:\n\n- Execute arbitrary JavaScript in any connected user\u0027s browser session via the WebSocket messaging system\n- Steal session cookies and authentication tokens\n- Perform account takeover via session hijacking\n- Chain with CSRF to execute admin actions on behalf of the victim\n\nThe vulnerability affects the default SQLite WebSocket backend configuration.\n\n## Suggested Remediation\n\nApply `removeAutoEvalCodeOnHTMLRecursive()` in `MessageSQLite.php`, consistent with `Message.php` and `MessageSQLiteV2.php`:\n\n```php\n// Before (vulnerable \u2014 shallow strip):\nif (is_array($json[\u0027msg\u0027] ?? null)) {\n    unset($json[\u0027msg\u0027][\u0027autoEvalCodeOnHTML\u0027]);\n}\n\n// After (fixed \u2014 recursive strip):\n$json = removeAutoEvalCodeOnHTMLRecursive($json);\n```",
  "id": "GHSA-2fhx-q92v-5fhv",
  "modified": "2026-06-04T18:55:04Z",
  "published": "2026-06-04T18:55:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-2fhx-q92v-5fhv"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WWBN/AVideo/commit/3e0b3ce2bfa766183ff0ae227439394db57b1a23"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/WWBN/AVideo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "WWBN AVideo: Stored XSS via autoEvalCodeOnHTML Bypass in MessageSQLite WebSocket Handler (CVE-2026-43874 Bypass)"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-49279 (GCVE-0-2026-49279)

FKIE_CVE-2026-49279

GHSA-2FHX-Q92V-5FHV

AVideo: Stored XSS via autoEvalCodeOnHTML in MessageSQLite WebSocket Handler

Summary

Affected Versions

Vulnerability Details

Root Cause: Shallow sanitization only covers $json['msg']

Attack Chain

Proof of Concept

Impact

Suggested Remediation

Tags

Sightings

Nomenclature

AVideo: Stored XSS via `autoEvalCodeOnHTML` in MessageSQLite WebSocket Handler

Root Cause: Shallow sanitization only covers `$json['msg']`