CVE-2026-27599: CI4-CMS-ERP CI4MS

High severity, CVSS 7.2. EPSS: 0.4% 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. Prior to version 0.31.0.0, the application fails to properly sanitize user-controlled input within System Settings – Mail Settings. Several configuration fields, including Mail Server, Mail Port, Email Address, Email Password, Mail Protocol, and TLS settings, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. This issue has been patched in version 0.31.0.0.

Affected products

• CI4-CMS-ERP CI4MS: before 0.31.0.0 (fixed in 0.31.0.0)

Published 2026-03-30. Last modified 2026-06-17.