CVE-2025-12689 — DoS in Calls plugin via malformed UTF-8 in WebSocket request

CVE-2025-12689

DoS in Calls plugin via malformed UTF-8 in WebSocket request PUBLISHED

Description (CNA)

Mattermost versions 11.0.x <= 11.0.4, 10.12.x <= 10.12.2, 10.11.x <= 10.11.6 fail to check WebSocket request field for proper UTF-8 format, which allows attacker to crash Calls plug-in via sending malformed request.

Affected (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.0.0 through 11.0.4; affected 10.12.0 through 10.12.2; affected 10.11.0 through 10.11.6; unaffected 11.1.0; unaffected 11.0.5; unaffected 10.12.3; unaffected 10.11.7

CWE

CWE-1287

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.