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SCA: security update for github.com/mattermost/mattermost-server (GHSA-498j-wxww-j897)

medium Tenable Self-Hosted Container Security Plugin ID 436271

Description

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

 - An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. XSS could occur via the
 author_link field of a Slack attachment. (CVE-2017-18879)

See Also

https://github.com/advisories/GHSA-498j-wxww-j897

Plugin Details

Severity: Medium

ID: 436271

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 12/5/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 8.67

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2017-18879

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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-2017-18879

cwe: CWE-79