---
id: CVE-2023-6458
aliases:
  - GHSA-7664-hcp7-f497
  - BIT-mattermost-2023-6458
title: Mattermost Injection vulnerability
summary: Mattermost Injection vulnerability
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L'
vendor: mattermost
product: github.com/mattermost/mattermost-server/v6
ecosystem: go
affected:
  - github.com/mattermost/mattermost-server/v6 < 7.8.14
  - github.com/mattermost/mattermost/server/v8 < 8.1.5
  - 'github.com/mattermost/mattermost/server/v8 >= 9.0.0, < 9.0.3'
  - 'github.com/mattermost/mattermost/server >= 9.1.0, < 9.1.2'
patched:
  - github.com/mattermost/mattermost-server/v6 7.8.14
  - github.com/mattermost/mattermost/server/v8 8.1.5
  - github.com/mattermost/mattermost/server/v8 9.0.3
  - github.com/mattermost/mattermost/server 9.1.2
published: '2023-12-06'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:59.553122863Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-7664-hcp7-f497'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-6458'
  - url: 'https://github.com/mattermost/mattermost'
  - url: 'https://mattermost.com/security-updates'
tags:
  - osv
  - go
epss: 0.00643
epssPercentile: 0.48587
ingestedAt: '2026-09-12T03:13:01.762Z'
---

## Overview

Mattermost webapp fails to validate route parameters in/<TEAM_NAME>/channels/<CHANNEL_NAME> allowing an attacker to perform a client-side path traversal.



## Affected packages

- `github.com/mattermost/mattermost-server/v6 < 7.8.14`
- `github.com/mattermost/mattermost/server/v8 < 8.1.5`
- `github.com/mattermost/mattermost/server/v8 >= 9.0.0, < 9.0.3`
- `github.com/mattermost/mattermost/server >= 9.1.0, < 9.1.2`

## Remediation

Upgrade to a patched release:

- `github.com/mattermost/mattermost-server/v6 7.8.14`
- `github.com/mattermost/mattermost/server/v8 8.1.5`
- `github.com/mattermost/mattermost/server/v8 9.0.3`
- `github.com/mattermost/mattermost/server 9.1.2`