CVE-2026-39391
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
In CI4MS before version 0.31.4.0, the ban note parameter in UserController::ajax_blackList_post() is stored unsanitized 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 another admin viewing the user management page.
Risk Assessment
This XSS vulnerability allows session hijacking, data theft, or unauthorized actions in the context of an admin account, potentially leading to full compromise of the CMS system.
Recommendation
Immediately upgrade CI4MS to version 0.31.4.0 or later, which fixes the XSS vulnerability by properly sanitizing and encoding the input.
Original NVD description (English source)
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.