CVE-2026-35056: Xenforo

High severity, CVSS 7.2. EPSS: 0.9% chance of exploitation in the next 30 days.

XenForo before 2.3.9 and before 2.2.18 allows remote code execution (RCE) by authenticated, but malicious, admin users. An attacker with admin panel access can execute arbitrary code on the server.

Affected products

• Xenforo Xenforo: before 2.2.18 (fixed in 2.2.18); from 2.3.0, before 2.3.9 (fixed in 2.3.9)

Published 2026-04-01. Last modified 2026-06-17.