Server Crash Vulnerability in Mattermost Versions by Mattermost
CVE-2025-8402
4.9MEDIUM
What is CVE-2025-8402?
Certain versions of Mattermost contain a flaw in their bulk import feature, which fails to properly validate import data. This vulnerability can be exploited by a system administrator to intentionally cause a server crash, leading to downtime and loss of service availability. The affected versions include 10.8.x up to 10.8.3, 10.5.x up to 10.5.8, 9.11.x up to 9.11.17, 10.10.x up to 10.10.0, and 10.9.x up to 10.9.3. To mitigate this issue, administrators should ensure their Mattermost installations are updated to the latest secure versions.
Affected Version(s)
Mattermost 10.8.0 <= 10.8.3
Mattermost 10.5.0 <= 10.5.8
Mattermost 9.11.0 <= 9.11.17