Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server (GHSA-5mh6-p63g-3mv5)

high Tenable Self-Hosted Container Security Plugin ID 436134

Description

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

 - An issue was discovered in Mattermost Server before 5.1. It allows attackers to cause a denial of service
 via the invite_people slash command. (CVE-2018-21258)

See Also

https://github.com/advisories/GHSA-5mh6-p63g-3mv5

Plugin Details

Severity: High

ID: 436134

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 11/21/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2018-21258

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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-2018-21258

cwe: CWE-400