CVE-2026-39392
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk16th percentile - higher than 16% of all known CVEs
Summary
In CI4MS prior to 0.31.4.0, the Pages module does not apply html_purify validation to content fields, allowing stored XSS. An authenticated admin can inject arbitrary JavaScript that executes for every visitor.
Risk Assessment
An admin attacker can inject malicious scripts that execute on public pages, potentially leading to visitor data theft or session hijacking.
Recommendation
Immediately update CI4MS to version 0.31.4.0 or later.
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 Pages module does not apply the html_purify validation rule to content fields during create and update operations, while the Blog module does. Page content is stored unsanitized in the database and rendered as raw HTML on the public frontend via echo $pageInfo->content. An authenticated admin with page-editing privileges can inject arbitrary JavaScript that executes in the browser of every public visitor viewing the page. This vulnerability is fixed in 0.31.4.0.