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
| Software | From | Fixed in |
|---|---|---|
| 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 |