CVE-2025-67288 — Vulnerability in Umbraco.Cms — CVE Details

MEDIUM

Umbraco CMS has an arbitrary file upload vulnerability

Published December 22, 2025Updated September 10, 2026Source: osv

Summary

An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code via uploading a crafted PDF file. While Umbraco provides [hooks to perform file validation](https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation), it does not do implement filtering by default. Users are expected to implement their own validation. Note: This vulnerability is [disputed by Ubraco](https://github.com/github/advisory-database/pull/6633).

Advisory Timeline

First published December 22, 2025 (294 days ago).
Last revised September 10, 2026 — 261 days after initial publication.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

Package	Ecosystem	Affected	Fixed In
Umbraco.Cms	nuget	10.0.0, 10.0.0-rc1, 10.0.0-rc2, 10.0.0-rc3 (+251 more)	Range-based data available

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-434
Unrestricted File UploadMITRE
CWE-79
Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 10.0 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2025-67288?: Umbraco CMS has an arbitrary file upload vulnerability This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 10.0/10).
How do I check if my project is affected by CVE-2025-67288?: CVE-2025-67288 affects Umbraco.Cms. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-67288 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

10.0

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-54mj-vcvj-q3v5

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