CVE-2026-111898— phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via Keycloak Implicit Account Linking
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（不含）版本中存在身份验证绕过漏洞。该漏洞允许 Keycloak 用户通过匹配 preferred_username 或 email 字段，接管本地账户。若攻击者控制了一个用户名发生冲突或邮箱未经验证的 Keycloak 身份，即可通过访问 /auth/keycloak/authorize 接口绑定其主体（subject），从而获取超级管理员权限。
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I. Basic Information for CVE-2026-111898
Vulnerability Information
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Vulnerability Title
phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via Keycloak Implicit Account Linking
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains an authentication bypass vulnerability that allows Keycloak users to take over local accounts by matching preferred_username or email. Attackers controlling a Keycloak identity with a colliding username or unverified email can log in through /auth/keycloak/authorize to bind their subject and gain superadmin privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-111898
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Vendor Advisories for CVE-2026-111898 (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-2026-111907 | 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 |
| 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-287
-
CVE-2026-104627
Gitea OpenID account linking without session binding -
CVE-2026-111911
phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAut -
CVE-2026-111895
phpMyFAQ 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta Acco -
CVE-2026-111882
phpMyFAQ 3.2.0-alpha before 4.1.9 and 4.2.0-alpha before 4.2 -
CVE-2026-110653
Appointment Booking Plugin <= 5.7.4 - Unauthenticated Authen
V. Comments for CVE-2026-111898
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