# CVE-2024-48929: Umbraco CMS Has Incomplete Server Termination During Explicit Sign-Out

> Attackers can maintain access after sign-out because the server session is not fully terminated, allowing potential account takeover.

- **Severity:** Medium 4.2 (`CVSS:3.1/AV:N/AC:H/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:** Yes
- **Published:** 22 Oct 2024
- **Updated:** 22 Oct 2024
- **Also known as:** GHSA-wxw9-6pv9-c3xc

## What is CVE-2024-48929?

CVE-2024-48929 is a medium-severity authentication bypass vulnerability in Umbraco Umbraco Cms, published on 22 Oct 2024. 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

Umbraco is a free and open source .NET content management system. In versions on the 13.x branch prior to 13.5.2 and versions on the 10.x branch prior to 10.8.7, during an explicit sign-out, the server session is not fully terminated. Versions 13.5.2 and 10.8.7 contain a patch for the issue.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2024-48929?

4 open source packages ship an affected version, including Umbraco.CMS. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Umbraco.CMS` | NuGet | From 10.0.0 | 10.8.7 |
| `Umbraco.CMS` | NuGet | From 10.0.0 | 10.8.7 |
| `Umbraco.CMS` | NuGet | From 13.0.0 | 13.5.2 |
| `Umbraco.CMS` | NuGet | From 13.0.0 | 13.5.2 |

Products: Umbraco Umbraco Cms.

## How do I fix CVE-2024-48929?

Upgrade Umbraco.CMS to a fixed version for your release line: 10.8.7 or 13.5.2.

## Is CVE-2024-48929 being exploited?

There is no known exploitation of CVE-2024-48929 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-2024-48929 and fix it if it is affected.

What it is: CVE-2024-48929 is a medium-severity authentication bypass vulnerability in Umbraco Umbraco Cms, published on 22 Oct 2024. 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-2024-48929 in the wild and no public exploit code.

Affected packages and fixed versions:
- Umbraco.CMS (NuGet): affected from 10.0.0; fixed in 10.8.7
- Umbraco.CMS (NuGet): affected from 10.0.0; fixed in 10.8.7
- Umbraco.CMS (NuGet): affected from 13.0.0; fixed in 13.5.2
- Umbraco.CMS (NuGet): affected from 13.0.0; fixed in 13.5.2

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-2024-48929/ (Markdown: https://insights.sbomify.com/CVE-2024-48929/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-48929
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-48929
- OSV: https://osv.dev/vulnerability/CVE-2024-48929

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-48929/
Summaries are generated and may contain mistakes; the official description above is the record.