Medium severity · published Jul 30, 2025
CVE-2025-54425
Umbraco's Delivery API allows for cached requests to be returned with an invalid API key
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UM
Umbraco-CMS · umbraco
>= 13.0.0, < 13.9.3; >= 15.0.0, < 15.4.4; >= 16.0.0, < 16.1.1 · source: vendor
UC
Umbraco Cms · Umbraco
13.0.0 before 13.9.3; 15.0.0 before 15.4.4; 16.0.0 before 16.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-54425
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-54425
Product
https://docs.umbraco.com/umbraco-cms/reference/content-delivery-api
Patch
https://github.com/umbraco/Umbraco-CMS/commit/7e82c258eebaa595eadc9b000461e27d02bc030e
Patch
https://github.com/umbraco/Umbraco-CMS/commit/9f37db18d11c8ba4e3ecdeb35291af30ebee7cd0
Patch
https://github.com/umbraco/Umbraco-CMS/commit/da43086017e1e318f6b5373391d78421efebce3a
Third Party Advisory
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-75vq-qvhr-7ffr
More from Umbraco-CMS
10.0
CVE-2025-67288
An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file
9.8
CVE-2012-10054
Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE
9.8
CVE-2023-37267
Umbraco is a ASP.NET CMS
9.8
CVE-2014-10074
Umbraco before 7.2.0 has a remote PHP code execution vulnerability because Umbraco.Web.UI/config/umbracoSettings.Release.config does not block the upload of .php files
9.8
CVE-2012-1301
The FeedProxy.aspx script in Umbraco 4.7.0 allows remote attackers to proxy requests on their behalf via the "url" parameter