CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.3. See the original NVD description below for full technical details.
CVE
CVE-2026-6517
Severity
MEDIUM
CVSS
6.3
EPSS
0.19%
Original NVD Description
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to restrict the allow list of domains to which NTLM credentials were forwarded to in the Mattermost Desktop App which allows any user on a server without the image proxy enabled to intercept other users credentials via embedding an image that routes to an external web server. Mattermost Advisory ID: MMSA-2026-00651
Related CVEs
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