CVE-2026-35055

XenForo Cross-Site Scripting via Lightbox in Posts

CVSS 5.1 MEDIUMEPSS 0.2%CWE-79

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected products

XenForo · XenForo

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://www.vulncheck.com/advisories/xenforo-cross-site-scripting-via-lightbox-in-posts https://xenforo.com/community/threads/xenforo-2-3-9-inc-xfmg-2-2-18-released-security-fix.235659/