9.1
/ 10
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Description
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.
Basic Information
ID
CVE-2025-53909
Source
GitHub_M
Published
Jul 17, 2025 at 13:47
Modified
Jul 17, 2025 at 19:54
Affected Product
Vendor
mailcow
Product
mailcow-dockerized
Version
< 2025-07
Affected Versions
mailcow mailcow-dockerized < 2025-07