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TI-2025-34230 Aliases CVE-2025-54425GHSA-75vq-qvhr-7ffr

Umbraco's Delivery API allows for cached requests to be returned with an invalid API key

Priority LOW 30CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0039 33rd percentileScored 2026-11-07
Fix Fixed Umbraco-CMS (umbraco): 13.9.3, 15.4.4, 16.1.1Umbraco.Cms.Api.Delivery (NuGet): 13.9.3, 15.4.4, 16.1.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
umbracoUmbraco-CMS13.0.0 to before 13.9.3; 15.0.0 to before 15.4.4; 16.0.0 to before 16.1.113.9.3, 15.4.4, 16.1.1Patch availableCNA
—Umbraco.Cms.Api.Delivery (NuGet)13.0.0 to before 13.9.313.9.3Patch availableGHSA-75vq-qvhr-7ffr
—Umbraco.Cms.Api.Delivery (NuGet)15.0.0 to before 15.4.415.4.4Patch availableGHSA-75vq-qvhr-7ffr
—Umbraco.Cms.Api.Delivery (NuGet)16.0.0 to before 16.1.116.1.1Patch availableGHSA-75vq-qvhr-7ffr
  • Umbraco-CMS Vendorumbraco Affected 13.0.0 to before 13.9.3; 15.0.0 to before 15.4.4; 16.0.0 to before 16.1.1 Fixed in 13.9.3, 15.4.4, 16.1.1 Patch available CNA
  • Umbraco.Cms.Api.Delivery (NuGet) Vendor— Affected 13.0.0 to before 13.9.3 Fixed in 13.9.3 Patch available GHSA-75vq-qvhr-7ffr
  • Umbraco.Cms.Api.Delivery (NuGet) Vendor— Affected 15.0.0 to before 15.4.4 Fixed in 15.4.4 Patch available GHSA-75vq-qvhr-7ffr
  • Umbraco.Cms.Api.Delivery (NuGet) Vendor— Affected 16.0.0 to before 16.1.1 Fixed in 16.1.1 Patch available GHSA-75vq-qvhr-7ffr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*13.0.0 to before 13.9.3; 15.0.0 to before 15.4.4; 16.0.0 to before 16.1.1Vulnerableumbraco
  • cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:* Versions 13.0.0 to before 13.9.3; 15.0.0 to before 15.4.4; 16.0.0 to before 16.1.1 Vulnerable ·umbraco

Remediation

  • Fix · CNA Umbraco-CMS (umbraco) Fixed in 13.9.3, 15.4.4, 16.1.1
  • Fix · GHSA-75vq-qvhr-7ffr Umbraco.Cms.Api.Delivery (NuGet) Fixed in 13.9.3 Advisory →
  • Fix · GHSA-75vq-qvhr-7ffr Umbraco.Cms.Api.Delivery (NuGet) Fixed in 15.4.4 Advisory →
  • Fix · GHSA-75vq-qvhr-7ffr Umbraco.Cms.Api.Delivery (NuGet) Fixed in 16.1.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-54425
  2. 2026-10-03 Alias added: GHSA-75vq-qvhr-7ffr

References

Patch 3

Advisory 2

Other 2

  • TI-2025-41183 An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute… CVSS 3.1CRITICAL 10.0
  • TI-2012-05477 Umbraco CMS < 4.7.1 codeEditorSave.asmx RCE CVSS 4.0CRITICAL 9.3
  • TI-2021-22392 Umbraco v8.14.1 - 'baseUrl' SSRF CVSS 4.0MEDIUM 6.9
  • TI-2024-36846 A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers… CVSS 3.1MEDIUM 6.5
  • TI-2019-15240 Umbraco CMS 4.11.8 through 7.15.10, and 7.12.4, allows Remote Code Execution by… CVSS 3.1HIGH 7.2
  • TI-2020-04738 Cross-site scripting in Umbraco CMS CVSS 3.1MEDIUM 5.4
See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences