CVE-2025-49136

Name: CVE-2025-49136
Creator: NVD / NIST
Published: 2025-06-09T17:15:29.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2025-49136 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.89%

54.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1336

Affected Software

Vendor	Product	Versions
Nadh	Listmonk	>= 4.0.0, < 5.0.2

References

https://github.com/knadh/listmonk/commit/d27d2c32cf3af2d0b24e29ea5a686ba149b49b3ePatch
https://github.com/knadh/listmonk/releases/tag/v5.0.2Release Notes
https://github.com/knadh/listmonk/security/advisories/GHSA-jc7g-x28f-3v3hExploit, Vendor Advisory
https://github.com/knadh/listmonk/security/advisories/GHSA-jc7g-x28f-3v3hExploit, Vendor Advisory

Timeline

Published: Jun 9, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-49136?

How severe is CVE-2025-49136?

CVE-2025-49136 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2025-49136?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-49136?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST