What is GHSA-63wg-qmrv-7q66?

GHSA-63wg-qmrv-7q66 is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Server allows attackers to log sensitive information via DEBUG REST API logging endpoint

Which CVE IDs does GHSA-63wg-qmrv-7q66 cover?

GHSA-63wg-qmrv-7q66 covers the following CVE IDs: CVE-2017-18896. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-63wg-qmrv-7q66?

GHSA-63wg-qmrv-7q66 has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

Which products are affected by GHSA-63wg-qmrv-7q66?

GHSA-63wg-qmrv-7q66 affects 3 products, including: go/github.com/mattermost/mattermost-server:\u003e= 4.1.0, \u003c 4.1.1; go/github.com/mattermost/mattermost-server:\u003c 4.0.5; go/github.com/mattermost/mattermost-server:\u003e= 4.2.0-rc1, \u003c 4.2.0.

GHSA-63wg-qmrv-7q66MediumCVSS 5.3

Mattermost Server allows attackers to log sensitive information via DEBUG REST API logging endpoint

Vendor

GitHub Security Advisories

Published

May 24, 2022

Last Modified

January 12, 2026

🔗 CVE IDs covered (1)

CVE-2017-18896 →

📋 Description

An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows attackers to add DEBUG lines to the logs via a REST API version 3 logging endpoint.

🎯 Affected products3

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

🔗 References (6)

https://nvd.nist.gov/vuln/detail/CVE-2017-18896
https://github.com/mattermost/mattermost/commit/3c34e2b2dcb0fde96a10e68d877aa7d0ab511669
https://github.com/mattermost/mattermost/commit/722fb1947a2e7395ccf16adce9206736d803a9f3
https://github.com/mattermost/mattermost/commit/d38328976e2c8bb0fab91e656042a0d8ac37bc76
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-63wg-qmrv-7q66