Users can view the contents of an archived channel when access is explicitly denied by the system admin
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2.6epss 0.6%
exploitation probability
0.6%top 53% of all CVEs
observed exploitation
nono source reports it
Mattermost 6.1 and earlier fails to sufficiently validate permissions while viewing archived channels, which allows authenticated users to view contents of archived channels even when this is denied by system administrators by directly accessing the APIs.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
Affected products
Mattermost · MattermostReferences
https://mattermost.com/security-updates/