Missing Authentication for Critical Function Affecting ci4-cms-erp/ci4ms package, versions <0.31.4.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-CI4CMSERPCI4MS-15989824
- published12 Apr 2026
- disclosed8 Apr 2026
- creditoffset
Introduced: 8 Apr 2026
CVE-2026-39393 (opens in a new tab)How to fix?
Upgrade ci4-cms-erp/ci4ms to version 0.31.4.0 or higher.
Overview
ci4-cms-erp/ci4ms is a composer create-project ci4-cms-erp/ci4ms
Affected versions of this package are vulnerable to Missing Authentication for Critical Function in the install route guard process when the database is temporarily unreachable and the cache is empty. An attacker can gain full control over the application by sending crafted POST requests to overwrite the .env file with attacker-controlled database credentials, leading to application takeover, credential theft, and data integrity loss. This is only exploitable if the database is unreachable at the same time the cache has expired or been cleared.