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CVE-2026-49279— WWBN AVideo: Stored XSS via autoEvalCodeOnHTML Bypass in MessageSQLite WebSocket Handler (CVE-2026-43874 Bypass)

Quick assessment

Affected
WWBN AVideo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WWBN avideo是WWBN组织开源的一套视频内容管理系统。 WWBN AVideo 29.0及之前版本存在跨站脚本漏洞，该漏洞源于MessageSQLite WebSocket Handler中autoEvalCodeOnHTML参数存在存储型跨站脚本问题，可能导致经过身份验证的攻击者注入攻击载荷，绕过清理机制，在连接的浏览器会话中执行任意JavaScript，窃取会话cookie和身份验证令牌，通过会话劫持接管账户，并结合CSRF执行管理员操作。以下版本受到影响：29.0及之前版本。

AI Predicted 8.1 Difficulty: Easy EPSS 0.54% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
WWBN AVideo <= 29.0 affected
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I. Basic Information for CVE-2026-49279

Vulnerability Information
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Vulnerability Title
WWBN AVideo: Stored XSS via autoEvalCodeOnHTML Bypass in MessageSQLite WebSocket Handler (CVE-2026-43874 Bypass)
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WWBN AVideo 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WWBN avideo是WWBN组织开源的一套视频内容管理系统。 WWBN AVideo 29.0及之前版本存在跨站脚本漏洞，该漏洞源于MessageSQLite WebSocket Handler中autoEvalCodeOnHTML参数存在存储型跨站脚本问题，可能导致经过身份验证的攻击者注入攻击载荷，绕过清理机制，在连接的浏览器会话中执行任意JavaScript，窃取会话cookie和身份验证令牌，通过会话劫持接管账户，并结合CSRF执行管理员操作。以下版本受到影响：29.0及之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
WWBN AVideo <= 29.0 -

II. Public POCs for CVE-2026-49279

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III. Intelligence Information for CVE-2026-49279

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Patches & Fixes for CVE-2026-49279 (1)

Vendor Advisories for CVE-2026-49279 (1)

Same Patch Batch · WWBN · 2026-07-15 · 5 CVEs total

CVE-2026-54458 9.6 CRITICAL AVideo: Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast
CVE-2026-50182 6.1 MEDIUM AVideo Has Unauthenticated Reflected XSS via $_GET['search'] in YouTubeAPI Gallery Paginat
CVE-2026-33684 5.3 MEDIUM AVideo's Privilege AVideo: Escalation via Unguarded Permission Parameters in signUp API Al
CVE-2026-50183 4.7 MEDIUM WWBN AVideo: Stored XSS via Hostile YouTube Video Title in AVideo YouTubeAPI Gallery Secti

IV. Related Vulnerabilities

Same product: AVideo
Same vendor: WWBN
Same weakness: CWE-79

V. Comments for CVE-2026-49279

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