CVE-2025-58430: Nadh Listmonk

Medium severity, CVSS 6.1. EPSS: 0.1% chance of exploitation in the next 30 days.

listmonk is a standalone, self-hosted, newsletter and mailing list manager. In versions up to and including 1.1.0, every http request in addition to the session cookie `session` there included `nonce`. The value is not checked and validated by the backend, removing `nonce` allows the requests to be processed correctly. This may seem harmless, but if chained to other vulnerabilities it can become a critical vulnerability. Cross-site request forgery and cross-site scripting chained together can result in improper admin account creation. As of time of publication, no patched versions are available.

Affected products

• Nadh Listmonk: up to and including 1.1.0

Published 2025-09-09. Last modified 2026-09-30.