CVE-2026-39391 — CI4MS has Stored XSS via Unescaped Blacklist Note in Admin User List
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the blacklist (b…
Published: 2026-04-08 · CVSS: 4.8 · CVSS 3.1
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the blacklist (ban) note parameter in UserController::ajax_blackList_post() is stored in the database without sanitization and rendered into an HTML data-note attribute without escaping. An admin with blacklist privileges can inject arbitrary JavaScript that executes in the browser of any other admin who views the user management page. This vulnerability is fixed in 0.31.4.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7