Access Control Issue in Mattermost Messaging Platform
CVE-2025-41436

3.1LOW

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
14 November 2025

What is CVE-2025-41436?

A vulnerability exists in Mattermost versions prior to 11.0, where the setting allowing users to view archived channels is not effectively enforced. This oversight permits regular users to access content and files from archived channels via the 'Open in Channel' functionality, potentially exposing sensitive information and compromising user privacy.

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Affected Version(s)

Mattermost <11.0 <= 11.0

Mattermost 11.0.0

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
3.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

BhaRat (hackit_bharat)
JSON
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