Mattermost · Mattermost · CVE-2025-20088
**Name of the Vulnerable Software and Affected Versions**
Mattermost versions 9.11.x through 9.11.5
Mattermost versions 10.0.x through 10.0.3
Mattermost versions 10.1.x through 10.1.3
Mattermost versions 10.2.x through 10.2.0
**Description**
The issue is related to the improper validation of post properties, which allows a malicious authenticated user to cause a crash via a malicious post. This can be achieved through a public post, but specific details about the exploitation, such as API endpoints or vulnerable parameters, are not provided.
**Recommendations**
For Mattermost versions 9.11.x through 9.11.5, update to a version later than 9.11.5 to resolve the issue.
For Mattermost versions 10.0.x through 10.0.3, update to a version later than 10.0.3 to resolve the issue.
For Mattermost versions 10.1.x through 10.1.3, update to a version later than 10.1.3 to resolve the issue.
For Mattermost versions 10.2.x through 10.2.0, update to a version later than 10.2.0 to resolve the issue.