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OpenAdvisories
Medium · 6.1 CVE-2026-35055 EUVD-2026-17741GHSA-7285-3w46-g6m6

XenForo Cross-Site Scripting via Lightbox in Posts

Published Apr 1, 2026 · Updated May 24, 2026 · Assigned by VulnCheck

Description

XenForo before 2.3.9 and before 2.2.18 is vulnerable to cross-site scripting (XSS) related to lightbox usage in posts. An attacker can inject malicious scripts that execute when users interact with post content displayed in the lightbox.

Affected products

VendorProductAffectedFixed
XenForo XenForo 2.3.0 – < 2.3.9, < 2.2.18 2.3.9

References