CVE-2023-38694 Umbraco CMS vulnerable to possible injection of HTML in an unintended form
Authenticated users can inject HTML into specific backoffice forms, potentially leading to cross-site scripting attacks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-38694?
CVE-2023-38694 is a low-severity cross-site scripting vulnerability in Umbraco Umbraco Cms, published on 12 Dec 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.7.0, and 12.1.0, a user with access to a specific part of the backoffice is able to inject HTML code into a form where it is not intended. Versions 8.18.10, 10.7.0, and 12.1.0 contain a patch for this issue.
Weakness: CWE-79
Which versions are affected by CVE-2023-38694?
6 open source packages ship an affected version, including Umbraco.CMS. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.CMS NuGet | From 11.0.0 | 12.1.0 |
Umbraco.CMS NuGet | From 11.0.0 | 12.1.0 |
Umbraco.CMS NuGet | From 8.0.0 | 8.18.10 |
Umbraco.CMS NuGet | From 8.0.0 | 8.18.10 |
Umbraco.CMS NuGet | From 9.0.0 | 10.7.0 |
Umbraco.CMS NuGet | From 9.0.0 | 10.7.0 |
Products include Umbraco Umbraco Cms.
How do I fix CVE-2023-38694?
Upgrade Umbraco.CMS to a fixed version for your release line: 12.1.0, 8.18.10 or 10.7.0.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-38694 being exploited?
There is no known exploitation of CVE-2023-38694 in the wild and no public exploit code.
Other vulnerabilities in Umbraco Umbraco Cms
- CVE-2025-67288 Umbraco CMS has an arbitrary file upload vulnerability
- CVE-2014-10074 File upload in n/a
- CVE-2012-1301 Server-side request forgery in n/a
- CVE-2012-10054 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
- CVE-2025-32017 Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users
Sources
Also known as GHSA-xxc6-35r7-796w.