CVE-2026-73319
mediumXenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary…
Vendor / product: Xenforo — xenforo
XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary JavaScript in the board origin by crafting a malicious javascript: URI that bypasses host validation. Attackers can embed the board hostname in the URI authority component and use percent-encoded newlines to evade server-side filters, causing authenticated users who perform a Follow action to execute attacker-supplied JavaScript in their browser.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://bombobombone.github.io/posts/cve-2026-73319/ disclosure@vulncheck.com
- https://github.com/BomboBombone/CVE-2026-73319 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/xenforo-xss-via-dynamic-redirect-handler disclosure@vulncheck.com
- https://xenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-ga... disclosure@vulncheck.com
- https://xenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-securit... disclosure@vulncheck.com