What is GHSA-wj5w-qghh-gvqp?

GHSA-wj5w-qghh-gvqp is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Server does not neutralize HTML content in an Email template field

Which CVE IDs does GHSA-wj5w-qghh-gvqp cover?

GHSA-wj5w-qghh-gvqp covers the following CVE IDs: CVE-2017-18892. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-wj5w-qghh-gvqp?

GHSA-wj5w-qghh-gvqp has a CVSS v3 base score of 6.1, published by GitHub Security Advisories.

Which products are affected by GHSA-wj5w-qghh-gvqp?

GHSA-wj5w-qghh-gvqp affects 3 products, including: go/github.com/mattermost/mattermost-server:\u003c 4.0.5; go/github.com/mattermost/mattermost-server:\u003e= 4.1.0, \u003c 4.1.1; go/github.com/mattermost/mattermost-server:\u003e= 4.2.0-rc1, \u003c 4.2.0.

GHSA-wj5w-qghh-gvqpMediumCVSS 6.1

Mattermost Server does not neutralize HTML content in an Email template field

Vendor

GitHub Security Advisories

Published

May 24, 2022

Last Modified

January 14, 2026

🔗 CVE IDs covered (1)

CVE-2017-18892 →

📋 Description

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. E-mail templates can have a field in which HTML content is not neutralized.

🎯 Affected products3

go/github.com/mattermost/mattermost-server:< 4.0.5
go/github.com/mattermost/mattermost-server:>= 4.1.0, < 4.1.1
go/github.com/mattermost/mattermost-server:>= 4.2.0-rc1, < 4.2.0

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2017-18892
https://github.com/mattermost/mattermost/commit/4e05fbffed4d7ad75c0bb55d67d2c6f7cf9eaad6
https://github.com/mattermost/mattermost/commit/d76946bdb545aba4088943fc523dabb459d22873
https://github.com/mattermost/mattermost/commit/f5167f3ba645b829f4c28530e13be6c3db967255
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-wj5w-qghh-gvqp