CVE-2025-24012 Umbraco Backoffice Components Have XSS/HTML Injection Vulnerability
Authenticated users can inject malicious scripts into localized backoffice components, potentially leading to code execution or account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-24012?
CVE-2025-24012 is a medium-severity cross-site scripting vulnerability in Umbraco Umbraco Cms, published on 21 Jan 2025. Any signed-in user can exploit it over the network, 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. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, authenticated users are able to exploit a cross-site scripting vulnerability when viewing certain localized backoffice components. Versions 14.3.2 and 15.1.2 contain a patch.
Weakness: CWE-79
Which versions are affected by CVE-2025-24012?
8 open source packages ship an affected version, including Umbraco.Cms.StaticAssets and @umbraco-cms/backoffice. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.Cms.StaticAssets NuGet | From 14.0.0 | 14.3.2 |
Umbraco.Cms.StaticAssets NuGet | From 14.0.0 | 14.3.2 |
Umbraco.Cms.StaticAssets NuGet | From 15.0.0 | 15.1.2 |
Umbraco.Cms.StaticAssets NuGet | From 15.0.0 | 15.1.2 |
@umbraco-cms/backoffice npm | From 14.0.0 | 14.3.2 |
@umbraco-cms/backoffice npm | From 14.0.0 | 14.3.2 |
2 more packages
@umbraco-cms/backoffice npm | From 15.0.0 | 15.1.2 |
@umbraco-cms/backoffice npm | From 15.0.0 | 15.1.2 |
Products include Umbraco Umbraco Cms.
How do I fix CVE-2025-24012?
Upgrade Umbraco.Cms.StaticAssets to a fixed version for your release line: 14.3.2 or 15.1.2.
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-2025-24012 being exploited?
There is no known exploitation of CVE-2025-24012 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-wv8v-rmw2-25wc.