CVE-2026-111911
phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
- Published
- Last modified
- Status
- published
- Known exploitation
- Not listed in CISA KEV
- Fix
- Fixed in 4.1.9
- Public exploit
- None on Exploit-DB
CISA SSVC
- Exploitation: poc
- Automatable: yes
- Technical impact: total
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Decision points from CISA's Vulnrichment, assessed (SSVC 2.0.3).
SSVC documentationSummary
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.
Affected versions
- thorsten phpMyFAQ
From 4.0.0 · fixed in 4.1.9