Description
Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.
References (1)
Core 1
Core References
Vendor Advisory
https://mattermost.com/security-updates
Scores
CVSS v3
2.2
EPSS
0.0017
EPSS Percentile
6.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/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-522
Status
published
Products (3)
mattermost/mattermost
0 - 8.0.0-20250612074655-8f8612c63783Go
mattermost/mattermost-server
10.5.0 - 10.5.8Go
mattermost/mattermost_server
9.11.0 - 9.11.17
Published
Jul 18, 2025
Tracked Since
Feb 18, 2026