Detections
Analytics

SCA: security update for github.com/mattermost/mattermost, github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-server/v5, github.com/mattermost/mattermost-server/v6, github.com/mattermost/mattermost/server/v8 (GHSA-mqcj-8c2g-h97q)

medium Tenable Self-Hosted Container Security Plugin ID 436057

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership
 permissions in the Add Channel Member API which allows users from one team to access user metadata and
 channel membership information from other teams via the API endpoint (CVE-2025-11777)

See Also

https://github.com/advisories/GHSA-mqcj-8c2g-h97q

Plugin Details

Severity: Medium

ID: 436057

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 11/14/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS Score Source: CVE-2025-11777

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2025

Vulnerability Publication Date: 11/13/2025

Reference Information

CVE: CVE-2025-11777

cwe: CWE-863