Vulnerability Description
listmonk is a standalone, self-hosted, newsletter and mailing list manager. Starting in version 4.0.0 and prior to version 5.0.2, the `env` and `expandenv` template functions which is enabled by default in Sprig enables capturing of env variables on host. While this may not be a problem on single-user (super admin) installations, on multi-user installations, this allows non-super-admin users with campaign or template permissions to use the `{{ env }}` template expression to capture sensitive environment variables. Users should upgrade to v5.0.2 to mitigate the issue.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nadh | Listmonk | >= 4.0.0, < 5.0.2 |
Related Weaknesses (CWE)
References
- https://github.com/knadh/listmonk/commit/d27d2c32cf3af2d0b24e29ea5a686ba149b49b3Patch
- https://github.com/knadh/listmonk/releases/tag/v5.0.2Release Notes
- https://github.com/knadh/listmonk/security/advisories/GHSA-jc7g-x28f-3v3hExploitVendor Advisory
- https://github.com/knadh/listmonk/security/advisories/GHSA-jc7g-x28f-3v3hExploitVendor Advisory
FAQ
What is CVE-2025-49136?
CVE-2025-49136 is a vulnerability with a CVSS score of 9.0 (CRITICAL). listmonk is a standalone, self-hosted, newsletter and mailing list manager. Starting in version 4.0.0 and prior to version 5.0.2, the `env` and `expandenv` template functions which is enabled by defau...
How severe is CVE-2025-49136?
CVE-2025-49136 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-49136?
Check the references section above for vendor advisories and patch information. Affected products include: Nadh Listmonk.