# CVE-2020-8124: Improper Validation and Sanitization in url-parse

> Attackers can bypass security checks in the url-parse library due to insufficient input validation, potentially undermining URL-based security controls.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 4 Feb 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-8124, GHSA-46c4-8wrp-j99v, UBUNTU-CVE-2020-8124

## What is CVE-2020-8124?

CVE-2020-8124 is a medium-severity vulnerability in url-parse, published on 4 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Insufficient validation and sanitization of user input exists in url-parse npm package version 1.4.4 and earlier may allow attacker to bypass security checks.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-8124?

2 open source packages ship an affected version, including url-parse. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `url-parse` | npm | From 0.1.0 | 1.4.5 |
| `url-parse` | npm | From 0.1.0 | 1.4.5 |

Products: Url-Parse Project Url-Parse.

## How do I fix CVE-2020-8124?

Upgrade url-parse to 1.4.5 or later.

## Is CVE-2020-8124 being exploited?

There is no known exploitation of CVE-2020-8124 in the wild and no public exploit code.

## Other vulnerabilities in url-parse

- [CVE-2018-3774](https://insights.sbomify.com/CVE-2018-3774/): Open Redirect in url-parse (critical 10.0)
- [CVE-2022-0512](https://insights.sbomify.com/CVE-2022-0512/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (high 8.8)
- [CVE-2022-0691](https://insights.sbomify.com/CVE-2022-0691/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (medium 6.5)
- [CVE-2022-0686](https://insights.sbomify.com/CVE-2022-0686/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (medium 6.5)
- [CVE-2022-0639](https://insights.sbomify.com/CVE-2022-0639/): Authorization Bypass Through User-Controlled Key in unshiftio/url-parse (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-8124 and fix it if it is affected.

What it is: CVE-2020-8124 is a medium-severity vulnerability in url-parse, published on 4 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-8124 in the wild and no public exploit code.

Affected packages and fixed versions:
- url-parse (npm): affected from 0.1.0; fixed in 1.4.5
- url-parse (npm): affected from 0.1.0; fixed in 1.4.5

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-2020-8124/ (Markdown: https://insights.sbomify.com/CVE-2020-8124/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8124
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8124
- OSV: https://osv.dev/vulnerability/CVE-2020-8124

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-8124/
Summaries are generated and may contain mistakes; the official description above is the record.