What is GHSA-455c-vqrf-mghr?

GHSA-455c-vqrf-mghr is a security advisory published by GitHub Security Advisories with Medium severity. Mattermost Server Missing Authorization vulnerability

Which CVE IDs does GHSA-455c-vqrf-mghr cover?

GHSA-455c-vqrf-mghr covers the following CVE IDs: CVE-2023-2783. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-455c-vqrf-mghr?

GHSA-455c-vqrf-mghr has a CVSS v3 base score of 4.3, published by GitHub Security Advisories.

Which products are affected by GHSA-455c-vqrf-mghr?

GHSA-455c-vqrf-mghr affects 4 products, including: go/github.com/mattermost/mattermost-server/v6:= 7.10.0; go/github.com/mattermost/mattermost-server/v6:\u003e= 7.9.0, \u003c 7.9.4; go/github.com/mattermost/mattermost-server/v6:\u003e= 6.0.0, \u003c 7.8.5; go/github.com/mattermost/mattermost-server/v6:\u003c 6.0.0-20230511130429-1629a6ca7fed.

GHSA-455c-vqrf-mghrMediumCVSS 4.3

Mattermost Server Missing Authorization vulnerability

Vendor

GitHub Security Advisories

Published

June 16, 2023

Last Modified

July 25, 2025

🔗 CVE IDs covered (1)

CVE-2023-2783 →

📋 Description

Mattermost Apps Framework fails to verify that a secret provided in the incoming webhook request allowing an attacker to modify the contents of the post sent by the Apps.

🎯 Affected products4

go/github.com/mattermost/mattermost-server/v6:= 7.10.0
go/github.com/mattermost/mattermost-server/v6:>= 7.9.0, < 7.9.4
go/github.com/mattermost/mattermost-server/v6:>= 6.0.0, < 7.8.5
go/github.com/mattermost/mattermost-server/v6:< 6.0.0-20230511130429-1629a6ca7fed

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2023-2783
https://mattermost.com/security-updates
https://github.com/advisories/GHSA-455c-vqrf-mghr