High severity · published Dec 22, 2025
CVE-2025-14273
Mattermost Jira plugin user spoofing enables Jira request forgery.
8.3
CVSS
0.3%
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 with the Jira plugin enabled and Mattermost Jira plugin versions <=4.4.0 fail to enforce authentication and issue-key path restrictions in the Jira plugin, which allows an unauthenticated attacker who knows a valid user ID to issue authenticated GET and POST requests to the Jira server via crafted plugin payloads that spoof the user ID and inject arbitrary issue key paths. Mattermost Advisory ID: MMSA-2025-00555
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% 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-2025-14273
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-14273
Vendor Advisory
https://mattermost.com/security-updates
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