CVE-2026-35055
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
Product
Xenforo
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- xenforo xenforo2.2.18, 2.3.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xenforo xenforo | v < 2.2.18, 2.3.0 ≤ v < 2.3.9 | 2.2.18, 2.3.9 |
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