# CVE-2020-13241: Microweber allows Unrestricted File Upload

> Attackers can upload malicious files via the user edit screen due to missing file extension validation, potentially leading to remote code execution.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 May 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-89fp-j8v7-p82h

## What is CVE-2020-13241?

CVE-2020-13241 is a high-severity vulnerability in Microweber Microweber, published on 20 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Microweber 1.1.18 allows Unrestricted File Upload because admin/view:modules/load_module:users#edit-user=1 does not verify that the file extension (used with the Add Image option on the Edit User screen) corresponds to an image file.

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

## Which versions are affected by CVE-2020-13241?

2 open source packages ship an affected version, including microweber/microweber. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `microweber/microweber` | Packagist | All versions to 1.1.18 | None |
| `microweber/microweber` | Packagist | All versions to 1.1.18 | None |

Products: Microweber Microweber.

## How do I fix CVE-2020-13241?

No fix has been published for CVE-2020-13241 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13241 being exploited?

There is no known exploitation of CVE-2020-13241 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-2020-13241 and fix it if it is affected.

What it is: CVE-2020-13241 is a high-severity vulnerability in Microweber Microweber, published on 20 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-13241 in the wild and no public exploit code.

Affected packages and fixed versions:
- microweber/microweber (Packagist): affected all versions up to 1.1.18; no fix listed
- microweber/microweber (Packagist): affected all versions up to 1.1.18; no fix listed

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-2020-13241/ (Markdown: https://insights.sbomify.com/CVE-2020-13241/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13241
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13241
- OSV: https://osv.dev/vulnerability/CVE-2020-13241

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13241/
Summaries are generated and may contain mistakes; the official description above is the record.