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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Phpmyfaq Phpmyfaq
cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*
|
4.0.0
|
4.1.9
|
References 3
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-g6cq-6rqg-6c9p
disclosure@vulncheck.com
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-rg9h-f29v-xhxr
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/phpmyfaq-4.0.0-before-4.1.9-authentication…
disclosure@vulncheck.com