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Mattermost allows other users to determine when users had read channels via channel member objects

🗓️ 18 Nov 2025 18:32:52Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 13 Views

Mattermost allows others to know when users read channels due to missing access controls in the Agents plugin.

Related
Detection
Refs
Vulners
Node
mattermostmattermostRange<8.0.0-20250905150616-ba86dfc5876b6go
OR
mattermostmattermost-serverRange10.5.010.5.12go
OR
mattermostmattermost-serverRange10.11.010.11.4go

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27 Nov 2025 08:34Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.13 - 3.5
EPSS0.00145
SSVC
13