CVE-2025-31363
LOW3.0EPSS 0.18%Mattermost doesn't restrict domains LLM can request to contact upstream
Published: 4/16/2025Modified: 2/4/2026
Description
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 plugin's Jira tool.
Affected packages (5)
- Go/github.com/mattermost/mattermost-server>= 9.11.0+incompatible, < 9.11.10+incompatible, >= 10.4.0+incompatible, < 10.4.3+incompatible, >= 10.5.0+incompatible, < 10.5.1+incompatible
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8>= 10.5.0, < 10.5.1
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250218121836-2b5275d87136
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N |