CVE-2026-35056

HIGH 7.2

XenForo Remote Code Execution via Authenticated Admin

CVSS Score

7.2

EPSS Score

0.3%

EPSS Percentile

49th

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.

CWE	CWE-94
Vendor	xenforo
Product	xenforo
Published	Apr 1, 2026
Last Updated	Apr 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

XenForo / XenForo

2.3.0 < 2.3.9 0 < 2.2.18

References

NVD ↗ CVE.org ↗ EPSS Data ↗

xenforo.com: https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/ vulncheck.com: https://www.vulncheck.com/advisories/xenforo-remote-code-execution-via-authenticated-admin

Credits

UwU