CVE-2023-6547

Name: CVE-2023-6547
Creator: NVD / NIST
Published: 2023-12-12T09:15:09.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2023-6547 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team. . EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

Mattermost fails to validate team membership when a user attempts to access a playbook, allowing a user with permissions to a playbook but no permissions to the team the playbook is on to access and modify the playbook. This can happen if the user was once a member of the team, got permissions to the playbook and was then removed from the team.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.32%

23.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	<= 8.1.5
Mattermost	Mattermost Server	>= 9.2.0, <= 9.2.1

References

https://mattermost.com/security-updatesIssue Tracking, Vendor Advisory
https://mattermost.com/security-updatesIssue Tracking, Vendor Advisory

Timeline

Published: Dec 12, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-6547?

How severe is CVE-2023-6547?

CVE-2023-6547 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2023-6547?

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-2023-6547?

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

Scan your code now

Source: NVD / NIST