CVE-2023-6727

Leak Inaccessible Playbook Information via Channel Action IDOR

Description

Mattermost fails to perform correct authorization checks when creating a playbook action, allowing users without access to the playbook to create playbook actions. If the playbook action created is to post a message in a channel based on specific keywords in a post, some playbook information, like the name, can be leaked. 

Remediation

Solution:

  • Update Mattermost Server to versions 8.1.6, 9.2.2 or higher.

Category

3.1
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.25%
Vendor Advisory mattermost.com
Affected: Mattermost Mattermost
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-6727?
CVE-2023-6727 has been scored as a low severity vulnerability.
How to fix CVE-2023-6727?
To fix CVE-2023-6727: Update Mattermost Server to versions 8.1.6, 9.2.2 or higher.
Is CVE-2023-6727 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6727 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6727?
CVE-2023-6727 affects Mattermost Mattermost.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.