CVE-2026-111903— phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG DTD Entity Bypass
Quick assessment
Affected
thorsten phpMyFAQ
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.
phpMyFAQ 4.2.0-alpha 至 4.2.0-beta 之前的版本中，SvgSanitizer 组件存在存储型跨站脚本（XSS）漏洞。拥有 FAQ_EDIT 权限的用户可利用 XML DTD 自定义实体绕过内容净化机制。攻击者可上传一个定义了可扩展为 JavaScript 的实体的 SVG 文件，并将该实体嵌入锚点（<a>）标签的 href 属性中；当访客点击该链接时，脚本将被执行，从而导致管理员会话被劫持。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-111903
Vulnerability Information
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Vulnerability Title
phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG DTD Entity Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains a stored cross-site scripting vulnerability in SvgSanitizer that allows users with FAQ_EDIT permission to bypass sanitization using XML DTD custom entities. Attackers can upload an SVG defining an entity that expands to javascript in an anchor href, executing script when viewers click it to hijack admin sessions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A: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
Affected Products
II. Public POCs for CVE-2026-111903
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Other References for CVE-2026-111903 (2)
Same Patch Batch · thorsten · 2026-10-17 · 28 CVEs total
| CVE-2026-111911 | 9.8 CRITICAL | phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection |
| CVE-2026-111908 | 8.3 HIGH | phpMyFAQ 4.0.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta BOLA in FAQ Update via REST |
| CVE-2026-111884 | 8.3 HIGH | phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Missing Current-Password Step-Up o |
| CVE-2026-111909 | 8.1 HIGH | phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmin Deletion via deleteUser API |
| CVE-2026-111882 | 8.1 HIGH | phpMyFAQ 3.2.0-alpha before 4.1.9 and 4.2.0-alpha before 4.2.0-beta TOTP 2FA Bypass via SS |
| CVE-2026-111901 | 7.5 HIGH | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Unauthenticated DoS via API Pagination |
| CVE-2026-111898 | 7.5 HIGH | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via Keycloak Implicit Account Link |
| CVE-2026-111907 | 7.1 HIGH | phpMyFAQ 4.0.0 before 4.1.9 CSRF via /admin/api/update-database |
| CVE-2026-111897 | 7.1 HIGH | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Authorization Bypass in Attachment Administration E |
| CVE-2026-111895 | 6.8 MEDIUM | phpMyFAQ 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta Account Takeover via Entra ID pref |
| CVE-2026-111910 | 6.5 MEDIUM | phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Authorization Bypass via attachmen |
| CVE-2026-111886 | 6.5 MEDIUM | phpMyFAQ 4.2.0-alpha.2 before 4.2.0-beta 2FA Brute-Force via remove-twofactor Endpoint |
| CVE-2026-111892 | 6.5 MEDIUM | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Missing Rate Limiting on Password-Reset Endpoints |
| CVE-2026-111893 | 6.5 MEDIUM | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Privilege Escalation via Group Category Restriction |
| CVE-2026-111906 | 6.5 MEDIUM | phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta CSRF in Elasticsearch/OpenSearch A |
| CVE-2026-111905 | 6.0 MEDIUM | phpMyFAQ 3.2.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta IDOR Leaks TOTP Secret via / |
| CVE-2026-111891 | 5.5 MEDIUM | phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalation via Group Permissions A |
| CVE-2026-111890 | 5.5 MEDIUM | phpMyFAQ 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalation via updateUserRights |
| CVE-2026-111885 | 5.5 MEDIUM | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Missing Authorization via deleteGroup API |
| CVE-2026-111896 | 5.4 MEDIUM | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG Upload Sanitizer Bypass |
Showing top 20 of 28 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: phpMyFAQ
-
CVE-2026-111911
phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAut -
CVE-2026-111910
phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Auth -
CVE-2026-111909
phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmi -
CVE-2026-111908
phpMyFAQ 4.0.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet -
CVE-2026-111907
phpMyFAQ 4.0.0 before 4.1.9 CSRF via /admin/api/update-datab
Same vendor: thorsten
-
CVE-2026-111911
phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAut -
CVE-2026-111910
phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Auth -
CVE-2026-111909
phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmi -
CVE-2026-111908
phpMyFAQ 4.0.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet -
CVE-2026-111907
phpMyFAQ 4.0.0 before 4.1.9 CSRF via /admin/api/update-datab
Same weakness: CWE-79
-
CVE-2026-111932
Coder before 2.34.2 Stored HTML Injection via Appearance Set -
CVE-2026-111894
phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet -
CVE-2026-109701
WordPress PAYCOMET for WooCommerce plugin <= 5.45 - Cross Si -
CVE-2026-100316
European VAT Compliance Assistant for WooCommerce <= 1.36.10 -
CVE-2026-109983
YMC Filter <= 3.12.19 - Authenticated (Author+) Stored DOM-B
V. Comments for CVE-2026-111903
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