EUVD-2026-20484
GHSA-7cm9-v848-cfh2
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
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4Tags
Description
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.
Analysis
Stored cross-site scripting (XSS) in CI4MS prior to 0.31.4.0 allows authenticated administrators with blacklist privileges to inject arbitrary JavaScript through unsanitized note parameters, which executes in the browsers of other administrators viewing the user management page. The vulnerability requires high-privilege authenticated access and user interaction (admin viewing the affected page), limiting real-world impact despite the network-accessible attack vector.
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