CVE-2025-53909

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.

Reserved 2025-07-11 | Published 2025-07-17 | Updated 2025-07-17 | Assigner GitHub_M

Problem types

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine

Product status

< 2025-07
affected

References

github.com/...erized/security/advisories/GHSA-8p7g-6cjj-wr9m

github.com/...ommit/8c5f6c03214a4b2bdbf3c78932f860eee949012b

cve.org (CVE-2025-53909)

nvd.nist.gov (CVE-2025-53909)

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