What is GHSA-fcwg-45jh-5qhf?

GHSA-fcwg-45jh-5qhf is a security advisory published by GitHub Security Advisories with High severity. Mattermost Server vulnerable to CSRF if CORS is enabled

Which CVE IDs does GHSA-fcwg-45jh-5qhf cover?

GHSA-fcwg-45jh-5qhf covers the following CVE IDs: CVE-2017-18903. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-fcwg-45jh-5qhf?

GHSA-fcwg-45jh-5qhf has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

Which products are affected by GHSA-fcwg-45jh-5qhf?

GHSA-fcwg-45jh-5qhf affects 2 products, including: go/github.com/mattermost/mattermost-server:\u003c 3.9.2; go/github.com/mattermost/mattermost-server:\u003e= 3.10.0-rc1, \u003c 3.10.2.

GHSA-fcwg-45jh-5qhfHighCVSS 8.8

Mattermost Server vulnerable to CSRF if CORS is enabled

Vendor

GitHub Security Advisories

Published

May 24, 2022

Last Modified

January 12, 2026

🔗 CVE IDs covered (1)

CVE-2017-18903 →

📋 Description

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. CSRF can occur if CORS is enabled.

🎯 Affected products2

go/github.com/mattermost/mattermost-server:< 3.9.2
go/github.com/mattermost/mattermost-server:>= 3.10.0-rc1, < 3.10.2

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2017-18903
https://github.com/mattermost/mattermost/commit/312269ad0bd166174f07f9df7391fce714601600
https://github.com/mattermost/mattermost/commit/4519b03d95e8bfe1b2f74094673ae1a2f39f6b47
https://github.com/mattermost/mattermost/commit/a18479df0940be8503c9b88993490741793eba9e
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-fcwg-45jh-5qhf