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.

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

EPSS: 0.000 (12.4th percentile) — read the EPSS interpretation.

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.

Affected products

Xenforo — versions 2.3.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

XenForo 2.3.7 Released (Includes Security Fixes) (vendor-advisory, patch)
VulnCheck Advisory: XenForo Passkey Security Bypass (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.