What is GHSA-887v-xh2x-47cm?

GHSA-887v-xh2x-47cm is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Server is vulnerable to XSS through display name field

Which CVE IDs does GHSA-887v-xh2x-47cm cover?

GHSA-887v-xh2x-47cm covers the following CVE IDs: CVE-2017-18893. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-887v-xh2x-47cm?

GHSA-887v-xh2x-47cm has a CVSS v3 base score of 6.1, published by GitHub Security Advisories.

Which products are affected by GHSA-887v-xh2x-47cm?

GHSA-887v-xh2x-47cm 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-887v-xh2x-47cmMediumCVSS 6.1

Mattermost Server is vulnerable to XSS through display name field

Vendor

GitHub Security Advisories

Published

May 24, 2022

Last Modified

January 12, 2026

🔗 CVE IDs covered (1)

CVE-2017-18893 →

📋 Description

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. Display names allow XSS.

🎯 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-2017-18893
https://github.com/mattermost/mattermost/commit/2a4d88d07c5815deac103e109550d25338507151
https://github.com/mattermost/mattermost/commit/670bfbf62686ebe9f2ab332733d851a62b6950b0
https://github.com/mattermost/mattermost/commit/d0b42b9e527e93a61fd06a9b9106fc97067807e4
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-887v-xh2x-47cm