CVE-2026-111911— phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
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 4.0.0 至 4.1.9 版本（不含 4.1.9）存在身份验证绕过漏洞：其 WebAuthn 注册端点可在未进行身份验证或挑战验证的情况下，将凭据关联到任意账户。攻击者可预先构造一个目标用户名，提交伪造的 认证声明以注册通行密钥（passkey），随后绕过密码和 TOTP（基于时间的一次性密码）直接登录，从而实现账户接管。
Possible ATT&CK Techniques 3 AI
T1190 · Exploit Public-Facing Application T1078 · Valid Accounts T1110 · Brute Force
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I. Basic Information for CVE-2026-111911
Vulnerability Information
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Vulnerability Title
phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
Source: CVE Program / CVE List V5
Vulnerability Description
phpMyFAQ 4.0.0 before 4.1.9 contains an authentication bypass vulnerability where WebAuthn registration endpoints attach credentials to any account without authentication or challenge validation. Attackers can stage a victim username, submit a forged fmt=none attestation to register a passkey, then log in bypassing passwords and TOTP for account takeover.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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-2026-111911
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
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Vendor Advisories for CVE-2026-111911 (3)
Same Patch Batch · thorsten · 2026-10-17 · 28 CVEs total
| 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-2026-111901 | 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-2026-111906 | 6.5 MEDIUM | phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta CSRF in Elasticsearch/OpenSearch A |
| CVE-2026-111910 | 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-2026-111905 | 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-2026-111894 | 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: |
| 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-2026-111910
phpMyFAQ before 4.1.9 and 4.2.0-alpha before 4.2.0-beta Auth -
CVE-2026-111908
phpMyFAQ 4.0.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet -
CVE-2026-111909
phpMyFAQ before 4.1.9 Missing Authorization Allows Superadmi -
CVE-2026-111907
phpMyFAQ 4.0.0 before 4.1.9 CSRF via /admin/api/update-datab -
CVE-2026-111905
phpMyFAQ 3.2.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet
Same vendor: thorsten
-
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 -
CVE-2026-111905
phpMyFAQ 3.2.0 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet
Same weakness: CWE-287
-
CVE-2026-111898
phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via -
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 -
CVE-2026-68573
Apache Kylin: Unauthenticated Metastore Cleanup
V. Comments for CVE-2026-111911
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