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CVE-2026-35055
Published: Apr 1, 2026
Modified: May 24, 2026
PUBLISHED
CVSS v3.1
6.1
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.
| Vendor | Product | Versions |
|---|---|---|
XenForo | XenForo | affected 2.3.0 - < 2.3.9affected 0 - < 2.2.18 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
References
XenForo 2.3.9 (inc XFMG) & 2.2.18 Released (Security Fix)
vendor-advisory
patch
VulnCheck Advisory: XenForo Cross-Site Scripting via Lightbox in Posts
third-party-advisory
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