Description
When running in a High Availability configuration, Mattermost fails to sanitize some of the user_updated and post_deleted events broadcast to all users, leading to disclosure of sensitive information to some of the users with currently connected Websocket clients.
References (1)
Scores
CVSS v3
4.3
EPSS
0.0031
EPSS Percentile
54.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-200
CWE-668
Status
published
Products (5)
mattermost/mattermost-server
3.3.0 - 7.1.6Go
mattermost/mattermost-server
5.0.0 - 7.1.6Go
mattermost/mattermost-server
6.0.0 - 7.1.6Go
mattermost/mattermost_server
7.7.1
mattermost/mattermost_server
< 7.1.6
Published
Mar 31, 2023
Tracked Since
Feb 18, 2026