CVE-2025-48953
Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads
5.5
MEDIUM
CVSS 3.1
EPSS 0.19%
Description
### Impact Via a manipulated API request it's possible to upload a file that doesn't adhere with the configured allowable file extensions. ### Patches Patched in 15.4.2 and 16.0.0. ### Workarounds None available.
How to fix CVE-2025-48953
To remediate CVE-2025-48953, upgrade the affected package to a fixed version below.
- —upgrade to 15.4.2 or later
Is CVE-2025-48953 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 14.0.0, < 15.4.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L |