CVE-2026-35056

HIGH EPSS 47.2%

Published Apr 1, 20263mo ago · Modified Jun 17, 20261w ago

8.6 CVSS 4.0

High

Published Apr 1, 2026 3mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

8.6

Exploitability

—

Impact

—

Vector string

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required High

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

47.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-94 Improper Control of Generation of Code (Code Injection) Injection

Affected Products 2

Vendor	Product	Version	Range
xenforo	xenforo	*	<2.2.18
xenforo	xenforo	*	≥2.3.0 – <2.3.9

References 2

vulncheck.com https://www.vulncheck.com/advisories/xenforo-remote-code-execution-via-authenticated-admin

Third Party Advisory
xenforo.com https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/

Release Notes

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.