GO-2025-4255
NoneCVSS
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EPSS
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Published
Dec 30, 2025
CISA due date
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The record
Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing Calls plug-in in github.com/mattermost/mattermost-plugin-calls
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-plugin-calls | 0 | 1.11.0 |
Related vulnerabilities
- CVE-2025-12689 Mattermost fails to check Websocket request for proper UTF-8 format potentially crashing… Same vulnerability
- GO-2025-4254 Mattermost has CSRF vulnerability via Calls Widget page in… Also affects github.com/mattermost/mattermost-plugin-calls
- CVE-2025-62190 Mattermost has CSRF vulnerability via Calls Widget page Also affects github.com/mattermost/mattermost-plugin-calls