Description
Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.
References (1)
Scores
CVSS v3
2.7
EPSS
0.0016
EPSS Percentile
36.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
CWE-346
Status
published
Products (4)
mattermost/mattermost
0 - 5.3.2-0.20240604093018-5114c3b7cdb8Go
mattermost/mattermost
9.5.0 - 9.5.7Go
mattermost/mattermost_server
9.9.0
mattermost/mattermost_server
9.5.0 - 9.5.7
Published
Aug 01, 2024
Tracked Since
Feb 18, 2026