Vulnerability · Published Apr 1, 2026 · Assigned by VulnCheck
CVE-2026-35056XenForo Remote Code Execution via Authenticated Admin
High 7.2
In plain English
A high-severity code injection in XenForo from XenForo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.7%top 47.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 (as reported)
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- XenForo 2.3.9 (inc XFMG) & 2.2.18 Released (Security Fix) vendor-advisory, patch
- VulnCheck Advisory: XenForo Remote Code Execution via Authenticated Admin third-party-advisory