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

Published Dec 24, 2025
·
Updated

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

Affected Software

10 affected componentsFixes available
Mattermost Mattermost<=11.1.0, <=11.0.5, <=10.12.3, <=10.11.7
go/github.com/mattermost/mattermost-server>=11.1.0<11.1.1
11.1.1
go/github.com/mattermost/mattermost-server>=11.0.0<11.0.6
11.0.6
go/github.com/mattermost/mattermost-server>=10.12.0<10.12.4
10.12.4
go/github.com/mattermost/mattermost-server>=10.11.0<10.11.8
10.11.8
go/github.com/mattermost/mattermost/server/v8<8.0.0-20251121122154-b57c297c6d7
8.0.0-20251121122154-b57c297c6d7
Mattermost Mattermost Server>=10.11.0<10.11.8
Mattermost Mattermost Server>=10.12.0<10.12.4
Mattermost Mattermost Server>=11.0.0<11.0.6
Mattermost Mattermost Server>=11.1.0<11.1.1

Remediation

Information

Update Mattermost to versions 11.2.0, 11.1.1, 11.0.6, 10.12.4, 10.11.8 or higher.

Event History

Dec 24, 2025
CVE Published
via MITRE·08:02 AM
Data Sourced
via MITRE·08:02 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
DescriptionSeverityWeaknessAffected Software
Advisory Published
via GitHub·09:30 AM
Data Sourced
via GitHub·09:30 AM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-64641?

CVE-2025-64641 is rated as a high-severity vulnerability due to the potential for unauthorized access to sensitive Jira tickets.

2

How do I fix CVE-2025-64641?

To fix CVE-2025-64641, upgrade Mattermost to versions 11.1.1, 11.0.6, 10.12.4, or 10.11.8 or later.

3

What versions of Mattermost are affected by CVE-2025-64641?

CVE-2025-64641 affects Mattermost versions 11.1.0, 11.0.5, 10.12.3, and 10.11.7 and earlier.

4

What is the nature of the vulnerability in CVE-2025-64641?

CVE-2025-64641 allows malicious users to exfiltrate Jira tickets due to improper verification of post actions from the Jira plugin.

5

Who is impacted by CVE-2025-64641?

Any Mattermost user who interacts with posts from the Jira plugin in affected versions is at risk from CVE-2025-64641.

Company

Resources

Contact

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