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. 
Published 2023-12-12 09:15:10
Updated 2023-12-14 19:31:10
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Products affected by CVE-2023-6547

Exploit prediction scoring system (EPSS) score for CVE-2023-6547

0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 23 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-6547

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.4
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
2.8
2.5
NIST
3.7
LOW CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
1.2
2.5
Mattermost, Inc.

CWE ids for CVE-2023-6547

  • The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
    Assigned by: responsibledisclosure@mattermost.com (Secondary)

References for CVE-2023-6547

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