CVE-2024-24776: Incorrect Authorization leads to Channel Member Count Leak
First published: Fri Feb 09 2024(Updated: )
Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count API resulting in channel member counts being leaked to a user without permissions.
Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/mattermost/mattermost/server/v8 | >=9.0.0<9.3.0 | 9.3.0 |
| go/github.com/mattermost/mattermost/server/v8 | <8.1.8 | 8.1.8 |
| Mattermost | <=8.1.7 |
Remedy
Update Mattermost Server to versions 8.1.8, 9.4.0 or higher.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-24776?
CVE-2024-24776 has a medium severity rating due to unauthorized access to channel member counts.
How do I fix CVE-2024-24776?
To fix CVE-2024-24776, upgrade Mattermost Server to version 8.1.8 or 9.3.0 or later.
What versions are affected by CVE-2024-24776?
CVE-2024-24776 affects Mattermost Server versions up to 8.1.7 and versions between 9.0.0 and 9.3.0.
Who is impacted by CVE-2024-24776?
Users without proper permissions may inadvertently gain access to sensitive channel member counts due to CVE-2024-24776.
What specific API is involved in CVE-2024-24776?
CVE-2024-24776 involves a vulnerability in the POST /api/v4/channels/stats/member_count API.
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