Input Validation Flaw in Mattermost Affects Multiple Versions
CVE-2025-21088

6.5MEDIUM

Key Information:

Vendor
Mattermost
Status
Mattermost
Vendor
CVE Published:
15 January 2025

Summary

Mattermost contains a vulnerability whereby certain versions do not adequately validate the style of proto used in post.props.attachments. This flaw can be exploited by an attacker sending crafted input that may cause the Mattermost frontend to crash, disrupting services and affecting user experience. Users of the affected versions are urged to upgrade to secure versions to mitigate this risk.

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:
6.5
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
.