# CVE-2020-36772: Path traversal in cagefs

> Local attackers can read and write arbitrary files outside the CageFS environment via the sendmail proxy command.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **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:** 22 Jan 2024
- **Updated:** 30 May 2025
- **Also known as:** GHSA-xcjc-c88c-v52w

## What is CVE-2020-36772?

CVE-2020-36772 is a medium-severity path traversal vulnerability in Cloudlinux OS cagefs, published on 22 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

CloudLinux CageFS 7.0.8-2 or below insufficiently restricts file paths supplied to the sendmail proxy command. This allows local users to read and write arbitrary files of certain file formats outside the CageFS environment.

Weakness: CWE-610 (Externally Controlled Reference to a Resource in Another Sphere), CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2020-36772?

It affects 1 product.


Products: Cloudlinux Cagefs.

## How do I fix CVE-2020-36772?

No fix has been published for CVE-2020-36772 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36772 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36772 exists.

## Other vulnerabilities in Cloudlinux OS cagefs

- [CVE-2020-36771](https://insights.sbomify.com/CVE-2020-36771/): Information disclosure in cagefs (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36772 and fix it if it is affected.

What it is: CVE-2020-36772 is a medium-severity path traversal vulnerability in Cloudlinux OS cagefs, published on 22 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36772 exists.

Affected product: Cloudlinux OS cagefs. 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-2020-36772/ (Markdown: https://insights.sbomify.com/CVE-2020-36772/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36772
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36772
- OSV: https://osv.dev/vulnerability/CVE-2020-36772

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36772/
Summaries are generated and may contain mistakes; the official description above is the record.