CVE-2023-6547

LOW

Mattermost < 8.1.5 - Improper Access Control in Playbook Team Membership Validation

Title source: llm

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.

References (1)

Core 1

Core References

Issue Tracking, Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 3.7

EPSS 0.0032

EPSS Percentile 55.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284

Status published

Products (1)

mattermost/mattermost_server < 8.1.5

Published Dec 12, 2023

Tracked Since Feb 18, 2026