CVE-2024-21848
LowCVSS 3.1Summary
Improper Access Control in Mattermost Server versions 8.1.x before 8.1.11 allows an attacker in a channel with an active call to keep participating in the call even if they are removed from the channel.
Risk Assessment
A user removed from a channel can still hear and participate in the call, violating confidentiality and access control. This may lead to information leakage.
Recommendation
Update Mattermost Server to version 8.1.11 or later. Check that removed users are not left in active calls.
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Original NVD description (English source)
Improper Access Control in Mattermost Server versions 8.1.x before 8.1.11 allows an attacker that is in a channel with an active call to keep participating in the call even if they are removed from the channel
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

