Authorization Bypass in Mattermost Plugins Affects Comment Modification
CVE-2026-2461

4.3MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
16 March 2026

What is CVE-2026-2461?

Certain versions of Mattermost Plugins lack proper authorization checks on comment block modifications. This deficiency allows a user with editor permissions to alter comments created by other board members, potentially leading to miscommunication or unauthorized modifications within collaborative environments.

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Affected Version(s)

Mattermost 0 <= 11.0.3

Mattermost 0 <= 11.2.2

Mattermost 0 <= 10.10.11

References

https://mattermost.com/security-updates
vendor-advisory

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daynight
JSON
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