CVE-2025-48953
low-risk
Published 2025-06-03
Umbraco is an ASP.NET content management system (CMS). Starting in version 14.0.0 and prior to versions 15.4.2 and 16.0.0, it's possible to upload a file that doesn't adhere with the configured allowable file extensions via a manipulated API request. The issue is patched in versions 15.4.2 and 16.0.0. No known workarounds are available.
Do I need to act?
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0.19% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10
Medium
NETWORK
/ HIGH complexity
Affected Products (1)
Affected Vendors
23
/ 100
low-risk
Severity
17/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal