What’s Vulnerable › Vulnerabilities
CVE-2023-47858: Details of archived public channels are leaked to members of another team
- Severity: medium (CVSS 4.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-01-02 · updated 2026-06-17
- Weakness: CWE-284
Description
Mattermost fails to properly verify the permissions needed for viewing archived public channels, allowing a member of one team to get details about the archived public channels of another team via the GET /api/v4/teams/<team-id>/channels/deleted endpoint.
Affected products
- Mattermost: before 8.1.7; from 9.0.0 before 9.0.5; from 9.1.0 before 9.1.4; from 9.2.0 before 9.2.3 — fixed in 8.1.7, 9.0.5, 9.1.4, 9.2.3
How to fix
Upgrade to a fixed version: Mattermost 8.1.7, 9.0.5, 9.1.4, 9.2.3. Check the vendor advisory for mitigations.
References
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