Summary
generated automatically from NVD dataphpMyFAQ versions 4.0.0 before 4.1.9 have an authentication bypass (CWE-287) in their WebAuthn registration endpoints, which attach credentials to any account without requiring authentication or challenge validation. An attacker can stage a victim's username, submit a forged fmt=none attestation to register a passkey, and then log in without the password or TOTP, taking over the account. The flaw is rated CRITICAL with a CVSS v3.1 score of 9.8.
NVD 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.
EPSS · FIRST.org
0.42%probability of exploitation in the next 30 days
Higher than 35% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-18, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 17 oct. 2026
- Updated
- 17 oct. 2026
- Status
- Deferred
- Source
- disclosure@vulncheck.com
Weaknesses (CWE)
Similar CVEs
Other vulnerabilities of type CWE-287
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