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CVE-2025-49136

Nadh Listmonk vulnerability

9.0 CRITICALPublic exploitEPSS 1.54%
  1. Published9 Jun 2025

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Nadh Listmonk≥ 4.0.0 < 5.0.2

Remediation

Fixed in
Nadh Listmonk≥ 5.0.2

References

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Frequently asked

Is CVE-2025-49136 being actively exploited?

CVE-2025-49136 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.54%.

How severe is CVE-2025-49136?

CVE-2025-49136 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 1.54% probability of exploitation.

Which products are affected by CVE-2025-49136?

Affected products include Nadh Listmonk.

How do I fix CVE-2025-49136?

Upgrade affected software to a fixed version, for example Nadh Listmonk 5.0.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-49136 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.