CVE-2025-54478

Name: CVE-2025-54478
Creator: NVD / NIST
Published: 2025-08-11T19:15:30.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2025-54478 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost instance which allows unauthenticated attackers to edit channel subscriptions via API call to the edit channel subscription endpoint.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost instance which allows unauthenticated attackers to edit channel subscriptions via API call to the edit channel subscription endpoint.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.22%

13.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Mattermost	Confluence	< 1.5.0

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Aug 11, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-54478?

How severe is CVE-2025-54478?

CVE-2025-54478 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2025-54478?

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-2025-54478?

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

Scan your code now

Source: NVD / NIST