Description
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow the modification of local channels by a remote, when shared channels are enabled, which allows a malicious remote to make an arbitrary local channel read-only.
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
9.9.0affected9.5.0 to ≤ 9.5.6affected9.7.0 to ≤ 9.7.5affected9.8.0 to ≤ 9.8.1affected9.10.0unaffected9.9.1unaffected9.5.7unaffected9.7.6unaffected9.8.2unaffected