EUVD-2026-18076
GHSA-g4pp-fhgf-8653
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 adding Pages to navigation menus through the Menu Management functionality. Page-related data selected via the Pages section is stored server-side and rendered without proper output encoding. This stored payload is later rendered unsafely within administrative interfaces and public-facing navigation menus, leading to stored DOM-based cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
Analysis
Stored cross-site scripting in CI4MS menu management allows authenticated attackers to inject malicious scripts that execute in administrative and public contexts with changed scope impact. Affecting all CI4MS versions prior to 0.31.0.0, attackers with low-level privileges can exploit inadequate input sanitization in the Pages-to-navigation-menu workflow to persistently embed DOM-based XSS payloads. …
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Remediation
Within 24 hours: Inventory all CI4MS instances and document current versions. Within 7 days: Upgrade all CI4MS installations to version 0.31.0.0 or later; prioritize systems with administrative access or multi-tenant configurations. …
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External POC / Exploit Code
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