title: Full name disclosure via team top membership with Show Full Name option disabled
description: Mattermost fails to check the Show Full Name option at the /api/v4/teams/TEAM_ID/top/team_members endpoint allowing a member to get the full name of another user even if the Show Full Name option was disabled
problem types: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
affected:
{
defaultStatus: unaffected
product: Mattermost
vendor: Mattermost
versions:
lessThanOrEqual: 7.8.9, status: affected, version: 0, versionType: semver
lessThanOrEqual: 8.1.0, status: affected, version: 0, versionType: semver
status: unaffected, version: 7.8.10
status: unaffected, version: 8.1.1
}
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 7.8.10, 8.1.1 or higher.