CVE-2025-71279 | XenForo before 2.3.7 contains a security issue affecting Pas… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2025-71279
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-04-01 00:19 UTC
Published: 2026-04-01 00:30 UTC
Last updated: 2026-04-01 19:00 UTC
Primary CWE: CWE-287
Improper Authentication
Vendor / Product: XenForo / XenForo
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
XenForo	XenForo	—	2.3.0 < 2.3.7

Weakness (CWE)

CWE	Source	Description
CWE-287	cna	Improper Authentication

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

XenForo 2.3.7 Released (Includes Security Fixes) https://xenforo.com/community/threads/xenforo-2-3-7-released-includes-security-fixes.232121/
VulnCheck Advisory: XenForo Passkey Security Bypass https://www.vulncheck.com/advisories/xenforo-passkey-security-bypass