Denial of Service Vulnerability in Mattermost by Mattermost Inc.
CVE-2025-20033

4.3MEDIUM

Key Information:

Vendor
Mattermost
Status
Mattermost
Vendor
CVE Published:
9 January 2025

Summary

Mattermost versions 10.2.0 and earlier, along with 9.11.x, 10.0.x, and 10.1.x up to specific versions, exhibit a failure to properly validate post types. This vulnerability allows malicious actors to craft posts with a custom notification type and specified properties, ultimately leading to a denial of service for users with the sysconsole_read_plugins permission. This issue underscores the significance of post validation in safeguarding user experience and workflow integrity.

Affected Version(s)

Mattermost 10.2.0

Mattermost 9.11.0 <= 9.11.5

Mattermost 10.0.0 <= 10.0.3

References

https://mattermost.com/security-updates

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

c0rydoras (c0rydoras)
.