CVE-2025-54425 Umbraco's Delivery API allows for cached requests to be returned with an invalid API key
Attackers can bypass API key authentication to read cached content if output caching is enabled without varying by the API key header.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-54425?
CVE-2025-54425 is a medium-severity authentication bypass vulnerability in Umbraco Umbraco Cms, published on 30 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Umbraco is an ASP.NET CMS. In versions 13.0.0 through 13.9.2, 15.0.0 through 15.4.1 and 16.0.0 through 16.1.0, the content delivery API can be restricted from public access where an API key must be provided in a header to authorize the request. It's also possible to configure output caching, such that the delivery API outputs will be cached for a period of time, improving performance. There's an issue when these two things are used together, where caching doesn't vary by the header that contains the API key. As such, it's possible for a user without a valid API key to retrieve a response for a given path and query if it has recently been requested and cached by request with a valid key. This is fixed in versions 13.9.3, 15.4.4 and 16.1.1.
Weakness: CWE-200
Which versions are affected by CVE-2025-54425?
6 open source packages ship an affected version, including Umbraco.Cms.Api.Delivery. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.Cms.Api.Delivery NuGet | From 13.0.0 | 13.9.3 |
Umbraco.Cms.Api.Delivery NuGet | From 13.0.0 | 13.9.3 |
Umbraco.Cms.Api.Delivery NuGet | From 15.0.0 | 15.4.4 |
Umbraco.Cms.Api.Delivery NuGet | From 15.0.0 | 15.4.4 |
Umbraco.Cms.Api.Delivery NuGet | From 16.0.0 | 16.1.1 |
Umbraco.Cms.Api.Delivery NuGet | From 16.0.0 | 16.1.1 |
Products include Umbraco Umbraco Cms.
How do I fix CVE-2025-54425?
Upgrade Umbraco.Cms.Api.Delivery to a fixed version for your release line: 13.9.3, 15.4.4 or 16.1.1.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-54425 being exploited?
There is no known exploitation of CVE-2025-54425 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-75vq-qvhr-7ffr.