CVE-2026-39393 : faille élevée ci4-cms-erp ci4ms (CVSS 8.1)

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the install route guard in ci4ms relies solely on a volatile cache check (cache('settings')) combined with .env file existence to block post-installation access to the setup wizard. When the database is temporarily unreachable during a cache miss (TTL expiry or admin-triggered cache clear), the guard fails open, allowing an unauthenticated attacker to overwrite the .env file with attacker-controlled database credentials, achieving full application takeover. This vulnerability is fixed in 0.31.4.0.

Sévérité

Élevée (CVSS 8.1)

Vecteur CVSS

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

8 avr. 2026

Dernière mise à jour

24 juil. 2026

• ci4-cms-erp ci4ms

• Fiche CVE-2026-39393 sur le NVD (NIST)
• github.com/ci4…