API Access Control Issues in Mattermost Product by Mattermost
CVE-2025-4128

4.3MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
11 June 2025

What is CVE-2025-4128?

The Mattermost communication platform is vulnerable due to improper access control in its API. Specifically, team information can be accessed by guest users who are not members of public teams, through direct API calls to the endpoint /api/v4/teams/{team_id}. This flaw allows unauthorized disclosure of sensitive information, potentially leading to data leaks and undermining team privacy.

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Affected Version(s)

Mattermost 10.5.0 <= 10.5.4

Mattermost 9.11.0 <= 9.11.13

Mattermost 10.8.0

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hackit_bharat
JSON
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