CVE-2026-35056
XenForo Remote Code Execution via Authenticated Admin
- State
- Published
- Severity
- 8.6 High
- Published
- Apr 1, 2026
- Updated
- May 25, 2026
- Reserved
- Apr 1, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.2 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products
| Product | Versions |
|---|---|
XenForoXenForo |
|
References
- XenForo 2.3.9 (inc XFMG) & 2.2.18 Released (Security Fix)vendor-advisorypatch
- VulnCheck Advisory: XenForo Remote Code Execution via Authenticated Adminthird-party-advisory
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