CVE-2025-64641 MEDIUM

CVE-2025-64641: Mattermost Jira plugin crafted action leaks Jira issue details

Vendor Mattermost
Product Mattermost
Weakness CWE-863 · Incorrect authorization
Published December 24, 2025
Last update December 24, 2025
View on NVD All CVEs

CVSS base score

4.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

December 24, 2025 CVE published
December 24, 2025 Record updated