What’s Vulnerable › Vulnerabilities
CVE-2022-2408: Guest accounts can list all public channels
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2022-07-14 · updated 2026-06-17
- Weakness: CWE-200
Description
The Guest account feature in Mattermost version 6.7.0 and earlier fails to properly restrict the permissions, which allows a guest user to fetch a list of all public channels in the team, in spite of not being part of those channels.
Affected products
- Mattermost App Framework: before 6.3.8; from 6.4.0 through 6.5.1; 6.6.0, 6.6.1, 6.7.0 — fixed in 6.3.8
How to fix
Upgrade to a fixed version: Mattermost App Framework 6.3.8. Check the vendor advisory for mitigations.
References
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