Sensitive credentials exposed in plaintext in Mattermost support packets
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields before including them in support packet generation, which allows a Mattermost System Admin or any party with access to a support packet to obtain sensitive credentials in plaintext via downloading a support packet from the System Console.. Mattermost Advisory ID: MMSA-2026-00607
Problem Types
| Type | CWE ID | Description |
|---|
| CWE | CWE-200 | CWE-200 Exposure of Sensitive Information to an Unauthorized Actor |
Type: CWE
Description: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Metrics
| Version | Base score | Base severity | Vector |
|---|
| 3.1 | 8.7 | HIGH | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N |
Version: 3.1
Base score: 8.7
Base severity: HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N