Vulnerability Details CVE-2025-53909
mailcow: dockerized is an open source groupware/email suite based on docker. A Server-Side Template Injection (SSTI) vulnerability exists in versions prior to 2025-07 in the notification template system used by mailcow for sending quota and quarantine alerts. The template rendering engine allows template expressions that may be abused to execute code in certain contexts. The issue requires admin-level access to mailcow UI to configure templates, which are automatically rendered during normal system operation. Version 2025-07 contains a patch for the issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 29.3%
CVSS Severity
CVSS v3 Score 9.1
References