What is GHSA-9j9j-mm2r-9rfm?

GHSA-9j9j-mm2r-9rfm is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Server has mishandled webhook access control

Which CVE IDs does GHSA-9j9j-mm2r-9rfm cover?

GHSA-9j9j-mm2r-9rfm covers the following CVE IDs: CVE-2017-18870. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-9j9j-mm2r-9rfm?

GHSA-9j9j-mm2r-9rfm has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

Which products are affected by GHSA-9j9j-mm2r-9rfm?

GHSA-9j9j-mm2r-9rfm affects 3 products, including: go/github.com/mattermost/mattermost-server:\u003c 4.3.4; go/github.com/mattermost/mattermost-server:\u003e= 4.4.0-rc1, \u003c 4.4.5; go/github.com/mattermost/mattermost-server:\u003e 4.5.0-rc1, \u003c 4.5.0.

GHSA-9j9j-mm2r-9rfmMediumCVSS 4.3

Mattermost Server has mishandled webhook access control

Vendor

GitHub Security Advisories

Published

May 24, 2022

Last Modified

December 3, 2025

🔗 CVE IDs covered (1)

CVE-2017-18870 →

📋 Description

An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, and 4.3.4. It mishandled webhook access control in the EnableOnlyAdminIntegrations case.

🎯 Affected products3

go/github.com/mattermost/mattermost-server:< 4.3.4
go/github.com/mattermost/mattermost-server:>= 4.4.0-rc1, < 4.4.5
go/github.com/mattermost/mattermost-server:> 4.5.0-rc1, < 4.5.0

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2017-18870
https://github.com/mattermost/mattermost/commit/03f5c939deb4a6ab2fd01639b5570799e4118bab
https://github.com/mattermost/mattermost/commit/dc9971404bc95474e05b456b746a24a6f0ad26ba
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-9j9j-mm2r-9rfm