Description
Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mattermost Mattermost
Default version status: unaffected
10.10.0 to ≤ 10.10.2affected10.5.0 to ≤ 10.5.10affected10.11.0 to ≤ 10.11.2affected10.12.0unaffected10.10.3unaffected10.5.11unaffected10.11.3unaffected