CVE-2024-34029 AD/LDAP Group Members Leak
Attackers can leak AD/LDAP group member lists via a missing authorization check in the channel linking endpoint, exposing sensitive directory data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-34029?
CVE-2024-34029 is a medium-severity vulnerability in Mattermost Mattermost Server, published on 26 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost versions 9.5.x <= 9.5.3, 9.7.x <= 9.7.1 and 8.1.x <= 8.1.12 fail to perform a proper authorization check in the /api/v4/groups/<group-id>/channels/<channel-id>/link endpoint which allows a user to learn the members of an AD/LDAP group that is linked to a team by adding the group to a channel, even if the user has no access to the team.
Weakness: CWE-200
Which versions are affected by CVE-2024-34029?
It affects 1 product.
Products include Mattermost Mattermost Server.
How do I fix CVE-2024-34029?
No fix has been published for CVE-2024-34029 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-34029 being exploited?
There is no known exploitation of CVE-2024-34029 in the wild and no public exploit code.
Other vulnerabilities in Mattermost Mattermost Server
- CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers
- CVE-2025-12421 Account Takeover via Code Exchange Endpoint
- CVE-2025-4981 Path Traversal Leading to RCE by Any Authenticated Mattermost User
- CVE-2025-20051 Arbitrary file read via block duplication in Mattermost Boards
- CVE-2025-25279 Arbitrary file read in Mattermost Boards via import & export board archive