CVE-2025-64641

Mattermost Jira plugin crafted action leaks Jira issue details

State: Published
Severity: 4.1 Medium
Published: Dec 24, 2025
Updated: Dec 24, 2025
Reserved: Nov 26, 2025

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

Scores

CVSS	Score	Vector	Source
3.1	4.1 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	11.1.0 through 11.1.0Affected 11.0.0 through 11.0.5Affected 10.12.0 through 10.12.3Affected 10.11.0 through 10.11.7Affected 11.2.0Not affected 11.1.1Not affected 11.0.6Not affected 10.12.4Not affected 10.11.8Not affected

References

MMSA-2025-00551vendor-advisory

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