CVE-2023-47858: Improper Access Control

January 2, 2024 (updated January 3, 2024)

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//channels/deleted endpoint.

References

github.com/advisories/GHSA-w88v-pjr8-cmv2
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2023-47858

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