Vulnerability Details CVE-2026-39393
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.5%
CVSS Severity
CVSS v3 Score 8.1
Products affected by CVE-2026-39393
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.1
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.2
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.1
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.2
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.3
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.4
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.5
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.6
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.21.3.7
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.23.0.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.23.0.1
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.23.0.2
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.23.1.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.16
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.18
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.19
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.20
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.27
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.42
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.45
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.24.0.60
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.0.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.0.1
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.0.2
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.0.30
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.0.39
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.0.43
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.1.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.2.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.25.3.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.0.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.1.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.2.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.3.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.3.1
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.3.2
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.3.3
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.26.3.4
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.27.0.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.28.0.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.28.3.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.28.4.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.28.5.0
-
cpe:2.3:a:ci4-cms-erp:ci4ms:0.28.6.0