CVE-2025-64641

MEDIUM

Mattermost 10.11.0-10.11.7, 10.12.0-10.12.3, 11.0.0-11.0.5, 11.1.0 - Incorrect Authorization via Jira Plugin Post Action

Title source: llm
STIX 2.1

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
https://mattermost.com/security-updates

Scores

CVSS v3 4.1
EPSS 0.0003
EPSS Percentile 7.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (3)
mattermost/mattermost 0 - 8.0.0-20251121122154-b57c297c6d7Go
mattermost/mattermost-server 10.11.0 - 10.11.8Go
mattermost/mattermost_server 10.11.0 - 10.11.8
Published Dec 24, 2025
Tracked Since Feb 18, 2026