Mattermost Auth Bypass Channel Info Leak
CVE-2024-42000 Published on November 9, 2024
Unauthorized Access to view channels' details
Mattermost versions 9.10.x <= 9.10.2, 9.11.x <= 9.11.1, 9.5.x <= 9.5.9 and 10.0.x <= 10.0.0 fail to properly authorize the requests to /api/v4/channels which allows a User or System Manager, with "Read Groups" permission but with no access for channels to retrieve details about private channels that they were not a member of by sending a request to /api/v4/channels.
Vulnerability Analysis
CVE-2024-42000 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2024-42000 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2024-42000
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Affected Versions
Mattermost:- Version 9.10.0, <= 9.10.2 is affected.
- Version 9.11.0, <= 9.11.1 is affected.
- Version 9.5.0, <= 9.5.9 is affected.
- Version 10.0.0 is affected.
- Version 10.1.0 is unaffected.
- Version 9.10.3 is unaffected.
- Version 9.11.2 is unaffected.
- Version 9.5.10 is unaffected.
- Version 10.0.1 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.