CVE-2025-48953

Published Jun 3, 2025

Last updated a month ago

CVSS medium 5.5

Overview

Description
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.
Source
security-advisories@github.com
NVD status
Awaiting Analysis

Risk scores

CVSS 3.1

Type
Secondary
Base score
5.5
Impact score
3.7
Exploitability score
1.3
Vector string
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L
Severity
MEDIUM

Weaknesses

security-advisories@github.com
CWE-434

Social media

Hype score
Not currently trending

  1. CVE-2025-48953 Umbraco CMS Unauthorized File Upload Vulnerability in Versions 14.0.0-15.4.1 https://t.co/UIZFngS65Q

    @VulmonFeeds

    3 Jun 2025

    10 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

References

Sources include official advisories and independent security research.