# CVE-2020-36233: Privilege escalation in Bitbucket Data Center

> Local attackers can escalate privileges due to weak permissions on the installation directory in Atlassian Bitbucket Server and Data Center.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Feb 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-9x2m-28m5-328q

## What is CVE-2020-36233?

CVE-2020-36233 is a high-severity vulnerability in Atlassian Bitbucket Data Center, published on 18 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Microsoft Windows Installer for Atlassian Bitbucket Server and Data Center before version 6.10.9, 7.x before 7.6.4, and from version 7.7.0 before 7.10.1 allows local attackers to escalate privileges because of weak permissions on the installation directory.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2020-36233?

It affects 1 product.


Products: Atlassian Bitbucket.

## How do I fix CVE-2020-36233?

No fix has been published for CVE-2020-36233 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36233 being exploited?

There is no known exploitation of CVE-2020-36233 in the wild and no public exploit code.

## Other vulnerabilities in Atlassian Bitbucket Data Center

- [CVE-2022-36804](https://insights.sbomify.com/CVE-2022-36804/): Atlassian Bitbucket Server and Data Center Command Injection (high 8.8, exploited in the wild)
- [CVE-2018-5225](https://insights.sbomify.com/CVE-2018-5225/): Path traversal in Bitbucket Server (critical 9.9)
- [CVE-2022-43781](https://insights.sbomify.com/CVE-2022-43781/): Command injection in Bitbucket Data Center (critical 9.8)
- [CVE-2019-15000](https://insights.sbomify.com/CVE-2019-15000/): Command injection in Bitbucket Data Center (critical 9.8)
- [CVE-2019-3397](https://insights.sbomify.com/CVE-2019-3397/): Path traversal in Bitbucket Data Center (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36233 and fix it if it is affected.

What it is: CVE-2020-36233 is a high-severity vulnerability in Atlassian Bitbucket Data Center, published on 18 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-36233 in the wild and no public exploit code.

Affected product: Atlassian Bitbucket Data Center. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-36233/ (Markdown: https://insights.sbomify.com/CVE-2020-36233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36233
- OSV: https://osv.dev/vulnerability/CVE-2020-36233

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36233/
Summaries are generated and may contain mistakes; the official description above is the record.