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    CVE-2025-48953

    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.

    Published:Jun 3, 2025
    Last Modified:Sep 22, 2025
    EPS:Jun 3, 2025
    EPSS Score:0.00043
    CVSS Score:5.5

    Affected Products

    Vendor
    Umbraco
    Product
    Umbraco Cms

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs

    Related CVEs

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    CVE-2026-31834 (CVSS 7.2) — Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability has b…
    CVE-2026-31833 (CVSS 6.7) — Umbraco is an ASP.NET CMS. From 16.2.0 to before 16.5.1 and 17.2.2, An authenticated backoffice user with acce…
    CVE-2026-31832 (CVSS 5.4) — Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulner…
    CVE-2021-47776 (CVSS 6.9) — Umbraco CMS v8.14.1 contains a server-side request forgery vulnerability that allows attackers to manipulate b…
    CVE-2025-67288 (CVSS 10) — An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by up…
    CVE-2025-66625 (CVSS 4.9) — Umbraco is an ASP.NET CMS. Due to unsafe handling and deletion of temporary files in versions 10.0.0 through 1…
    CVE-2012-10054 (CVSS 9.3) — Umbraco CMS versions prior to 4.7.1 are vulnerable to unauthenticated remote code execution via the codeEditor…
    CVE-2025-54425 (CVSS 5.3) — 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,…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High