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

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 11.1.1
  2. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 11.0.6
  3. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 10.12.4
  4. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 10.11.8
  5. Upgrade

    Upgrade go/github.com/mattermost/mattermost/server/v8 to a version that resolves this vulnerability.

    Fixed in 8.0.0-20251121122154-b57c297c6d7
  6. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 11.2.0
  7. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 11.1.1
  8. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 11.0.6
  9. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 10.12.4
  10. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 10.11.8

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

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

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203