# CVE-2021-36461: File upload in n/a

> Attackers can execute arbitrary code by uploading malicious files via the Settings Upload Picture section in Microweber.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-f987-r737-hx6g

## What is CVE-2021-36461?

CVE-2021-36461 is a high-severity vulnerability in Microweber Microweber, published on 15 Jul 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An Arbitrary File Upload vulnerability exists in Microweber 1.1.3 that allows attackers to getshell via the Settings Upload Picture section by uploading pictures with malicious code, user.ini.

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

## Which versions are affected by CVE-2021-36461?

It affects 1 product.


Products: Microweber Microweber.

## How do I fix CVE-2021-36461?

No fix has been published for CVE-2021-36461 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-36461 being exploited?

There is no known exploitation of CVE-2021-36461 in the wild and no public exploit code.

## Other vulnerabilities in Microweber Microweber

- [CVE-2022-0558](https://insights.sbomify.com/CVE-2022-0558/): Cross-site Scripting (XSS) - Stored in microweber/microweber (critical 9.8)
- [CVE-2020-23138](https://insights.sbomify.com/CVE-2020-23138/): File upload in n/a (critical 9.8)
- [CVE-2022-0688](https://insights.sbomify.com/CVE-2022-0688/): Business Logic Errors in microweber/microweber (critical 9.4)
- [CVE-2022-0660](https://insights.sbomify.com/CVE-2022-0660/): Generation of Error Message Containing Sensitive Information in microweber/microweber (critical 9.4)
- [CVE-2022-0913](https://insights.sbomify.com/CVE-2022-0913/): Integer Overflow or Wraparound in microweber/microweber (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-36461 and fix it if it is affected.

What it is: CVE-2021-36461 is a high-severity vulnerability in Microweber Microweber, published on 15 Jul 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-36461 in the wild and no public exploit code.

Affected product: Microweber Microweber. 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-2021-36461/ (Markdown: https://insights.sbomify.com/CVE-2021-36461/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-36461
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-36461
- OSV: https://osv.dev/vulnerability/CVE-2021-36461

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-36461/
Summaries are generated and may contain mistakes; the official description above is the record.