CVE-2026-41587: CI4-CMS-ERP CI4MS

High severity, CVSS 8.6. EPSS: 0.7% chance of exploitation in the next 30 days.

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0.0 to before version 0.31.7.0, a theme upload feature allows any authenticated backend user with theme-upload permission to achieve remote code execution (RCE) by uploading a crafted ZIP file. PHP files inside the ZIP are installed into the web-accessible public/ directory with no extension or content filtering, making them directly executable via HTTP. This issue has been patched in version 0.31.7.0.

Affected products

• CI4-CMS-ERP CI4MS: from 0.26.0.0, before 0.31.7.0 (fixed in 0.31.7.0)

Published 2026-05-07. Last modified 2026-06-17.