Auth bypass in Xenforo
CVE-2025-71279
XenForo before 2.3.7 contains a security issue affecting Passkeys that have been added to user accounts. An attacker may be able to compromise the security of Passkey-based authentication.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (36.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Xenforo — versions 2.3.0
Weakness classification (CWE)
References
- xenforo.com/community/threads/xenforo-2-3-7-released-includes-security-fixes.23… (vendor-advisory, Release Notes, patch)
- www.vulncheck.com/advisories/xenforo-passkey-security-bypass (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-71279?
- CVE-2025-71279 is a critical-severity vulnerability in Xenforo, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-04-01.
- How severe is CVE-2025-71279?
- Critical severity. CVSS v3 base score is 9.8 out of 10.