# CVE-2020-7685: Insecure Defaults

> Attackers can upload arbitrary files via default form configurations, potentially leading to code execution unless custom validation is implemented.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N`)
- **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:** 28 Jul 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-8m73-w2r2-6xxj

## What is CVE-2020-7685?

CVE-2020-7685 is a medium-severity vulnerability in UmbracoForms, published on 28 Jul 2020. 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

This affects all versions of package UmbracoForms. When using the default configuration for upload forms, it is possible to upload arbitrary file types. The package offers a way for users to mitigate the issue. The users of this package can create a custom workflow and frontend validation that blocks certain file types, depending on their security needs and policies.

Weakness: CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2020-7685?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `UmbracoForms` | NuGet | All versions to 8.4.1 | None |
| `UmbracoForms` | NuGet | All versions to 8.4.1 | None |

Products: Umbraco Umbraco Forms.

## How do I fix CVE-2020-7685?

No fix has been published for CVE-2020-7685 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7685 being exploited?

There is no known exploitation of CVE-2020-7685 in the wild and no public exploit code.

## Other vulnerabilities in UmbracoForms

- [CVE-2021-33224](https://insights.sbomify.com/CVE-2021-33224/): File upload in n/a (critical 9.8)
- [CVE-2025-68924](https://insights.sbomify.com/CVE-2025-68924/): UmbracoForms Vulnerable to Remote Code Execution via Untrusted WSDL Compilation in Dynamic SOAP Client Generation (high 7.5)
- [CVE-2026-24687](https://insights.sbomify.com/CVE-2026-24687/): Umbraco.Forms has path traversal and file enumeration vulnerability in Linux/Mac (medium 6.0)
- [CVE-2025-23041](https://insights.sbomify.com/CVE-2025-23041/): Short and Long Answer Fields Are Not Validated Server-Side For Maximum Length in Umbraco.Forms (medium 5.8)
- [CVE-2024-35239](https://insights.sbomify.com/CVE-2024-35239/): Stored Cross-site Scripting on Components of Umbraco Forms (low 2.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7685 and fix it if it is affected.

What it is: CVE-2020-7685 is a medium-severity vulnerability in UmbracoForms, published on 28 Jul 2020. 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-2020-7685 in the wild and no public exploit code.

Affected packages and fixed versions:
- UmbracoForms (NuGet): affected all versions up to 8.4.1; no fix listed
- UmbracoForms (NuGet): affected all versions up to 8.4.1; 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-2020-7685/ (Markdown: https://insights.sbomify.com/CVE-2020-7685/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7685
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7685
- OSV: https://osv.dev/vulnerability/CVE-2020-7685

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-7685/
Summaries are generated and may contain mistakes; the official description above is the record.