CVE-2025-53909
BaseFortify
Publication date: 2025-07-17
Last updated on: 2025-09-11
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mailcow | mailcow\ | _dockerized |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-1336 | The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a Server-Side Template Injection (SSTI) in mailcow's notification template system used for sending quota and quarantine alerts. It allows an attacker with admin-level access to the mailcow UI to inject and execute arbitrary code through template expressions during normal system operation.
How can this vulnerability impact me? :
If exploited, this vulnerability can lead to remote code execution on the mailcow server, potentially allowing an attacker to compromise confidentiality, integrity, and availability of the system and its data.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, immediately upgrade mailcow to version 2025-07 or later, which contains a patch for the Server-Side Template Injection issue. Additionally, restrict admin-level access to the mailcow UI to trusted personnel only, as exploitation requires admin access to configure templates.