CVE-2026-35054

MEDIUM

XenForo Stored Cross-Site Scripting via BB Code Rendering

Title source: cna

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.

References (2)

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

[Third Party Advisory] https://www.vulncheck.com/advisories/xenforo-stored-cross-site-scripting-via-bb-code-rendering

Scores

CVSS v3 6.4

EPSS 0.0003

EPSS Percentile 8.5%

Attack Vector NETWORK

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

Details

CWE

CWE-79

Status published

Products (2)

xenforo/xenforo < 2.3.9

XenForo/XenForo 2.3.0 - 2.3.9

Published Apr 01, 2026

Tracked Since Apr 01, 2026