Information disclosure in Umbraco Umbraco-Cms
CVE-2025-54425
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.
Vulnerability class: Information Disclosure
EPSS: 0.003 (26.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Umbraco Umbraco-cms — versions >= 13.0.0, < 13.9.3, >= 15.0.0, < 15.4.4, >= 16.0.0, < 16.1.1
- Umbraco Umbraco_cms
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-54425?
- CVE-2025-54425 is a medium-severity vulnerability in Umbraco Umbraco-Cms, classified under Information Disclosure. CVSS score: 5.3/10. Published 2025-07-30.
- How severe is CVE-2025-54425?
- Medium severity. CVSS v3 base score is 5.3 out of 10.