Medium severity · published Dec 24, 2025
CVE-2025-64641
Mattermost Jira plugin crafted action leaks Jira issue details
4.1
CVSS
0.2%
EPSS
No
On KEV
Description
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
11.1.0 through 11.1.0; 11.0.0 through 11.0.5; 10.12.0 through 10.12.3; 10.11.0 through 10.11.7 · source: vendor
MS
Mattermost Server · Mattermost
10.11.0 before 10.11.8; 10.12.0 before 10.12.4; 11.0.0 before 11.0.6; 11.1.0 before 11.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64641
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64641
Vendor Advisory
https://mattermost.com/security-updates
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