CVE-2026-73319 — XenForo < 2.3.13 XSS via Dynamic Redirect Handler
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 …
Published: 2026-09-08 · CVSS: 5.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7