Low severity · published Jul 18, 2025
CVE-2025-6227
Invite token is used as part of the secure communication
3.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.5.0 through 10.5.7; 9.11.0 through 9.11.16 · source: vendor
MS
Mattermost Server · Mattermost
9.11.0 before 9.11.17; 10.5.0 before 10.5.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6227
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6227
Vendor Advisory
https://mattermost.com/security-updates
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