What is CVE-2025-58430?

CVE-2025-58430 is a medium-severity vulnerability in Knadh Listmonk, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-09-09.

How severe is CVE-2025-58430?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2025-58430 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Knadh Listmonk

CVE-2025-58430

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (2.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Knadh Listmonk — versions <= 1.1.0
Nadh Listmonk

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-58430?: CVE-2025-58430 is a medium-severity vulnerability in Knadh Listmonk, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-09-09.
How severe is CVE-2025-58430?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2025-58430 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.