title: Channel commands execution doesn't properly verify permissions
description: Mattermost fails to properly check the permissions when executing commands allowing a member with no permissions to post a message in a channel to actually post it by executing channel commands.
problem types: CWE-862 Missing Authorization
affected:
{
defaultStatus: unaffected
product: Mattermost
vendor: Mattermost
versions:
lessThanOrEqual: 7.1.9, status: affected, version: 0, versionType: semver
lessThanOrEqual: 7.8.4, status: affected, version: 0, versionType: semver
lessThanOrEqual: 7.9.3, status: affected, version: 0, versionType: semver
status: affected, version: 7.10.0
status: unaffected, version: 7.1.10
status: unaffected, version: 7.8.5
status: unaffected, version: 7.9.4
status: unaffected, version: 7.10.1
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 4.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: LOW
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions: Update Mattermost Server to versions v7.1.10, v7.8.5, v7.9.4, v.7.10.1 or higher.