CVE-2026-35054

XenForo before 2.3.9 is vulnerable to stored cross-site scripting (XSS) related to BB code rendering. An attacker can inject malicious scripts through BB code that are stored and executed when other users view the content.

CVSS v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering	Third Party Advisory
https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:*

History

01 Apr 2026, 18:51

Type	Values Removed	Values Added
First Time		Xenforo Xenforo xenforo
CPE		cpe:2.3:a:xenforo:xenforo::::::::
References	~~() https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering -~~	() https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering - Third Party Advisory
References	~~() https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/ -~~	() https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/ - Release Notes
Summary		(es) XenForo anterior a 2.3.9 es vulnerable a cross-site scripting (XSS) almacenado relacionado con la renderización de código BB. Un atacante puede inyectar scripts maliciosos a través de código BB que se almacenan y ejecutan cuando otros usuarios ven el contenido.

01 Apr 2026, 01:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-01 01:16

Updated : 2026-04-01 18:51

NVD link : CVE-2026-35054

Mitre link : CVE-2026-35054

CVE.ORG link : CVE-2026-35054

JSON object : View

Products Affected

xenforo

xenforo

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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