# CVE-2021-45790: File upload in n/a

> Unauthenticated attackers can upload arbitrary files to execute commands via cron jobs in Metersphere.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 27 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8hj2-qp52-8qvm

## What is CVE-2021-45790?

CVE-2021-45790 is a critical vulnerability in n/a, published on 27 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An arbitrary file upload vulnerability was found in Metersphere v1.15.4. Unauthenticated users can upload any file to arbitrary directory, where attackers can write a cron job to execute commands.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2021-45790?

It affects 1 product.


Products: Metersphere Metersphere.

## How do I fix CVE-2021-45790?

No fix has been published for CVE-2021-45790 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45790 being exploited?

There is no known exploitation of CVE-2021-45790 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-29944](https://insights.sbomify.com/CVE-2023-29944/): Command injection in n/a (critical 9.8)
- [CVE-2021-45788](https://insights.sbomify.com/CVE-2021-45788/): SQL injection in n/a (high 8.8)
- [CVE-2023-25573](https://insights.sbomify.com/CVE-2023-25573/): Improper access control to download file in metersphere (high 8.6)
- [CVE-2022-23512](https://insights.sbomify.com/CVE-2022-23512/): Metersphere is vulnerable to Path Injection. (high 7.7)
- [CVE-2022-46178](https://insights.sbomify.com/CVE-2022-46178/): Path Traversal In MeterSpere allows file upload to any path (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45790 and fix it if it is affected.

What it is: CVE-2021-45790 is a critical vulnerability in n/a, published on 27 Dec 2021. 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-2021-45790 in the wild and no public exploit code.

Affected product: n/a. 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-2021-45790/ (Markdown: https://insights.sbomify.com/CVE-2021-45790/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45790
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45790
- OSV: https://osv.dev/vulnerability/CVE-2021-45790

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45790/
Summaries are generated and may contain mistakes; the official description above is the record.