EUVD-2026-18081
GHSA-r33w-c82v-x5v7
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Lifecycle Timeline
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 version 0.31.0.0, the application fails to properly sanitize user-controlled input when creating or editing blog posts within the Categories section. An attacker can inject a malicious JavaScript payload into the Categories content, which is then stored server-side. This stored payload is later rendered unsafely when the Categories are viewed via blog posts, without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
Analysis
Stored cross-site scripting in CI4MS (CodeIgniter 4 CMS) allows authenticated users with blog post management privileges to inject malicious JavaScript through unsanitized category fields, affecting all users who view blog posts containing the poisoned categories. The vulnerability is confirmed patched in version 0.31.0.0. …
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Remediation
Within 24 hours: Inventory all CI4MS deployments and confirm current versions; restrict blog post management privileges to fully-trusted staff only and audit recent category field modifications for suspicious content. Within 7 days: Upgrade all CI4MS instances to version 0.31.0.0 or later; conduct post-upgrade testing of blog post display and category functionality. …
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