Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server (GHSA-gg42-mwr6-p82c)

high Tenable Cloud Security Plugin ID 436698

Description

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

 - An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5, when used as an OAuth 2.0
 service provider. Sometimes. resource-owner authorization is bypassed, allowing account takeover.
 (CVE-2017-18894)

See Also

https://github.com/advisories/GHSA-gg42-mwr6-p82c

Plugin Details

Severity: High

ID: 436698

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 1/12/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.04

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2017-18894

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: 5/24/2022

Vulnerability Publication Date: 6/19/2020

Reference Information

CVE: CVE-2017-18894