CVE-2025-54425
Umbraco is an ASP.NET CMS.
Does this matter?
Lower severity and a low EPSS score (0.36%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.36% probability · 30th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- umbraco/umbraco cms
- Source
- security-advisories@github.com
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://docs.umbraco.com/umbraco-cms/reference/content-delivery-apiProduct
- https://github.com/umbraco/Umbraco-CMS/commit/7e82c258eebaa595eadc9b000461e27d02bc030ePatch
- https://github.com/umbraco/Umbraco-CMS/commit/9f37db18d11c8ba4e3ecdeb35291af30ebee7cd0Patch
- https://github.com/umbraco/Umbraco-CMS/commit/da43086017e1e318f6b5373391d78421efebce3aPatch
- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-75vq-qvhr-7ffrThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.