CVE-2026-35056 PUBLISHED

XenForo Remote Code Execution via Authenticated Admin

Assigner: VulnCheck
Reserved: 01.04.2026 Published: 01.04.2026 Updated: 01.04.2026

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 Vector: 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
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.2

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	XenForo
Product	XenForo
Versions	Default: unaffected affected from 2.3.0 to 2.3.9 (excl.) affected from 0 to 2.2.18 (excl.)

CVE-2026-35056 PUBLISHED

XenForo Remote Code Execution via Authenticated Admin

Metrics

Product Status

Credits

References

Problem Types