CVE-2025-64641
Medium
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
SeverityMedium
CVSS4.1
Exploit probability—
Product
Mattermost Server
PublishedDec 24, 2025
First seenDec 24, 2025
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server10.11.8, 10.12.4, 11.0.6, 11.1.1 or later
- github.com/mattermost/mattermost/server/v88.0.0-20251121122154-b57c297c6d7 or later
- github.com/mattermost/mattermost-server10.11.8, 10.12.4, 11.0.6, 11.1.1, 10.11.8+incompatible, 10.12.4+incompatible, 11.0.6+incompatible, 11.1.1+incompatible or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.8, 10.12.0 ≤ v < 10.12.4, 11.0.0 ≤ v < 11.0.6, 11.1.0 ≤ v < 11.1.1 | 10.11.8, 10.12.4, 11.0.6, 11.1.1 |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20251121122154-b57c297c6d7, No range specified | 8.0.0-20251121122154-b57c297c6d7 |
| github.com/mattermost/mattermost-serverGo | 10.11.0 ≤ v < 10.11.8, 10.12.0 ≤ v < 10.12.4, 11.0.0 ≤ v < 11.0.6, 11.1.0 ≤ v < 11.1.1, 10.11.0+incompatible ≤ v < 10.11.8+incompatible, 10.12.0+incompatible ≤ v < 10.12.4+incompatible, 11.0.1+incompatible ≤ v < 11.0.6+incompatible, 11.1.0+incompatible ≤ v < 11.1.1+incompatible | 10.11.8, 10.12.4, 11.0.6, 11.1.1, 10.11.8+incompatible, 10.12.4+incompatible, 11.0.6+incompatible, 11.1.1+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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