Mattermost versions 10.7.x <= 10.7.1, 10.6.x <= 10.6.3, 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly validate LDAP group ID attributes, allowing an authenticated administrator with PermissionSysconsoleWriteUserManagementGroups permission to execute LDAP search filter injection via the PUT /api/v4/ldap/groups/{remote_id}/link API when objectGUID is configured as the Group ID Attribute.
Exploitability
AV:NAC:LPR:HUI:NScope
S:CImpact
C:LI:NA:N4.1/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:NOther