# CVE-2021-3725: OS Command Injection in ohmyzsh/ohmyzsh

> Attackers can execute arbitrary commands by tricking users into navigating to a maliciously named directory and using history navigation shortcuts.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Nov 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-3jcx-v57w-c6rq

## What is CVE-2021-3725?

CVE-2021-3725 is a high-severity command injection vulnerability in ohmyzsh/ohmyzsh, published on 30 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Vulnerability in dirhistory plugin Description: the widgets that go back and forward in the directory history, triggered by pressing Alt-Left and Alt-Right, use functions that unsafely execute eval on directory names. If you cd into a directory with a carefully-crafted name, then press Alt-Left, the system is subject to command injection. Impacted areas: - Functions pop_past and pop_future in dirhistory plugin.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2021-3725?

It affects 1 product.


Products: Planetargon Oh My Zsh.

## How do I fix CVE-2021-3725?

No fix has been published for CVE-2021-3725 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-3725 being exploited?

There is no known exploitation of CVE-2021-3725 in the wild and no public exploit code.

## Other vulnerabilities in ohmyzsh/ohmyzsh

- [CVE-2021-3934](https://insights.sbomify.com/CVE-2021-3934/): OS Command Injection in ohmyzsh/ohmyzsh (high 7.8)
- [CVE-2021-3726](https://insights.sbomify.com/CVE-2021-3726/): OS Command Injection in ohmyzsh/ohmyzsh (high 7.5)
- [CVE-2021-3727](https://insights.sbomify.com/CVE-2021-3727/): OS Command Injection in ohmyzsh/ohmyzsh (high 7.5)
- [CVE-2021-3769](https://insights.sbomify.com/CVE-2021-3769/): OS Command Injection in ohmyzsh/ohmyzsh (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3725 and fix it if it is affected.

What it is: CVE-2021-3725 is a high-severity command injection vulnerability in ohmyzsh/ohmyzsh, published on 30 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-3725 in the wild and no public exploit code.

Affected product: ohmyzsh/ohmyzsh. 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-2021-3725/ (Markdown: https://insights.sbomify.com/CVE-2021-3725/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3725
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3725
- OSV: https://osv.dev/vulnerability/CVE-2021-3725

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-3725/
Summaries are generated and may contain mistakes; the official description above is the record.