CVE-2026-35054

Medium

Description

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.

SeverityMedium

CVSS6.4

Exploit probability—

Product

Xenforo

PublishedApr 1, 2026

First seenApr 1, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

xenforo xenforo2.3.9 or later

Patches

xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/

Affected products

Product	Affected versions	Fixed in
xenforo xenforo	v < 2.3.9	2.3.9

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