CVE-2019-20887

Name of the Vulnerable Software and Affected Versions Mattermost Server versions prior to 5.7.1 Mattermost Server versions prior to 5.6.4 Mattermost Server versions prior to 5.5.3 Mattermost Server versions prior to 4.10.6

Description The issue concerns the Mattermost Server not honoring flags API permissions, which affects the decision on whether a user can receive intra-team posts.

Recommendations For versions prior to 5.7.1, update to version 5.7.1 or later. For versions prior to 5.6.4, update to version 5.6.4 or later. For versions prior to 5.5.3, update to version 5.5.3 or later. For versions prior to 4.10.6, update to version 4.10.6 or later.