# CVE-2024-43377: Umbraco CMS Improper Access Control vulnerability

> Authenticated users can access unintended endpoints in Umbraco CMS, potentially reading or modifying data without proper authorization.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/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:** 20 Aug 2024
- **Updated:** 3 Sep 2024
- **Also known as:** GHSA-hrww-x3fq-xcvh

## What is CVE-2024-43377?

CVE-2024-43377 is a medium-severity missing authorization vulnerability in Umbraco Umbraco Cms, published on 20 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Umbraco CMS is an ASP.NET CMS. An authenticated user can access a few unintended endpoints. This issue is fixed in 14.1.2.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2024-43377?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Umbraco.Cms` | NuGet | From 14.0.0 | 14.1.2 |
| `Umbraco.Cms` | NuGet | From 14.0.0 | 14.1.2 |

Products: Umbraco Umbraco Cms.

## How do I fix CVE-2024-43377?

Upgrade Umbraco.Cms to 14.1.2 or later.

## Is CVE-2024-43377 being exploited?

There is no known exploitation of CVE-2024-43377 in the wild and no public exploit code.

## Other vulnerabilities in Umbraco Umbraco Cms

- [CVE-2025-67288](https://insights.sbomify.com/CVE-2025-67288/): Umbraco CMS has an arbitrary file upload vulnerability (critical 10.0)
- [CVE-2014-10074](https://insights.sbomify.com/CVE-2014-10074/): File upload in n/a (critical 9.8)
- [CVE-2012-1301](https://insights.sbomify.com/CVE-2012-1301/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2012-10054](https://insights.sbomify.com/CVE-2012-10054/): Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE (critical 9.3)
- [CVE-2025-32017](https://insights.sbomify.com/CVE-2025-32017/): Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-43377 and fix it if it is affected.

What it is: CVE-2024-43377 is a medium-severity missing authorization vulnerability in Umbraco Umbraco Cms, published on 20 Aug 2024. 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-2024-43377 in the wild and no public exploit code.

Affected packages and fixed versions:
- Umbraco.Cms (NuGet): affected from 14.0.0; fixed in 14.1.2
- Umbraco.Cms (NuGet): affected from 14.0.0; fixed in 14.1.2

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-2024-43377/ (Markdown: https://insights.sbomify.com/CVE-2024-43377/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-43377
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-43377
- OSV: https://osv.dev/vulnerability/CVE-2024-43377

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-43377/
Summaries are generated and may contain mistakes; the official description above is the record.