CVE-2026-111891— phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalation via Group Permissions API
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 从 4.2.0-alpha.2 到 4.2.0-beta（不含）版本中，其群组权限 API 存在权限提升漏洞。该漏洞源于 和 接口在检查用户权限时，未考虑语言或分类的作用域，从而允许写入无限制的群组权限。持有 权限的非超级管理员可以利用此漏洞：将其仅在狭窄作用域内拥有的权限授予某个群组，并通过 接口将自身加入该群组，从而获得跨所有语言和分类的无限制 FAQ 创建、编辑和发布权限。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-111891
Vulnerability Information
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Vulnerability Title
phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalation via Group Permissions API
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta contains a privilege escalation vulnerability in the group permission API, whose updatePermissions and updateMembers endpoints check held rights without regard to language or category scope and write unrestricted group grants. Non-superadmin administrators holding GROUP_EDIT can grant a group a right they hold only in a narrow scope and self-join it via updateMembers, gaining unrestricted FAQ create, edit, and publish access across all languages and categories.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-111891
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-111891 (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-2026-111882 | 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-2026-111909 | 8.1 HIGH | phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmin Deletion via deleteUser API |
| CVE-2026-111898 | 7.5 HIGH | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via Keycloak Implicit Account Link |
| CVE-2026-111901 | 7.5 HIGH | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Unauthenticated DoS via API Pagination |
| CVE-2026-111897 | 7.1 HIGH | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Authorization Bypass in Attachment Administration E |
| CVE-2026-111907 | 7.1 HIGH | phpMyFAQ 4.0.0 before 4.1.9 CSRF via /admin/api/update-database |
| 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-2026-111893 | 6.5 MEDIUM | phpMyFAQ 4.2.0-alpha before 4.2.0-beta Privilege Escalation via Group Category Restriction |
| 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-2026-111906 | 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-2026-111890 | 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 |
| CVE-2026-111894 | 5.4 MEDIUM | phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Stored XSS via iframe data: |
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-269
-
CVE-2026-111920
Vikunja 2.6.0 Broken Access Control via Inherited Project Pe -
CVE-2026-111909
phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmi -
CVE-2026-111893
phpMyFAQ 4.2.0-alpha before 4.2.0-beta Privilege Escalation -
CVE-2026-111890
phpMyFAQ 4.2.0-alpha.2 before 4.2.0-beta Privilege Escalatio -
CVE-2026-17491
IBM i is Affected By An Improper Privilege Management Vulner
V. Comments for CVE-2026-111891
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