EUVD-2026-18082
GHSA-x7wh-g25g-53vg
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. An attacker can inject a malicious JavaScript payload into blog post content, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views 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 blog module allows authenticated attackers to inject malicious JavaScript that executes in victims' browsers across multiple application views. The vulnerability affects all versions prior to 0.31.0.0 and stems from insufficient input sanitization when creating or editing blog posts combined with unsafe output rendering. …
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Remediation
Within 24 hours: identify all CI4MS instances and determine current version numbers; restrict blog post creation/editing permissions to trusted administrators only pending patching. Within 7 days: upgrade all CI4MS deployments to version 0.31.0.0 or later where vendor patch is available; test functionality in staging environment before production deployment. …
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External POC / Exploit Code
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