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GO-2025-4133 Mattermost allows other users to determine when users had read channels via channel member objects in github.com/mattermost/mattermost-server

🗓️ 25 Nov 2025 18:12:18Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 6 Views

Mattermost server exposes read status via channel member objects, letting others see when users read channels.

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03 Mar 2026 04:57Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.13 - 3.5
EPSS0.00145
SSVC
6