title: Details of archived public channels are leaked to members of another team
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.
problem types: CWE-284: Improper Access Control
affected:
{
defaultStatus: unaffected
product: Mattermost
vendor: Mattermost
versions:
lessThanOrEqual: 9.2.2, status: affected, version: 0, versionType: semver
lessThanOrEqual: 9.1.3, status: affected, version: 0, versionType: semver
lessThanOrEqual: 9.0.4, status: affected, version: 0, versionType: semver
lessThanOrEqual: 8.1.6, status: affected, version: 0, versionType: semver
status: unaffected, version: 8.1.7
status: unaffected, version: 9.0.5
status: unaffected, version: 9.1.4
status: unaffected, version: 9.2.3
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 4.3
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: Update Mattermost Server to versions 8.1.7, 9.0.5, 9.1.4, 9.2.3 or higher.