CVE-2026-35057

XenForo Stored Cross-Site Scripting via Structured Text Mentions

CVSS 5.1 MEDIUMEPSS 0.2%CWE-79

XenForo before 2.3.10 and before 2.2.19 is vulnerable to stored cross-site scripting (XSS) in structured text mentions, primarily affecting legacy profile post content. An attacker can inject malicious scripts through crafted mentions that are stored and executed when other users view the content.

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

Affected products

XenForo · XenForo

public PoCs found — 1

cve_referencegithub.com/methosiea/xenforo-2-xssunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://github.com/methosiea/xenforo-2-xss https://xenforo.com/community/threads/xenforo-2-3-10-add-ons-and-2-2-19-released-includes-security-fix.236249/