Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.9 fail to restrict domains the LLM can request to contact upstream which allows an authenticated user to exfiltrate data from an arbitrary server accessible to the victim via performing a prompt injection in the AI plugins Jira tool.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mattermost_server | Mattermost | 9.11.0 (including) | 9.11.10 (excluding) |
| Mattermost_server | Mattermost | 10.4.0 (including) | 10.4.3 (excluding) |
| Mattermost_server | Mattermost | 10.5.0 (including) | 10.5.0 (including) |