CVE-2025-67288
CriticalCVSS 10.0Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file. The supplier disputes this, stating that file validation is the administrator's responsibility and that PDF JavaScript runs in an isolated sandbox.
Risk Assessment
The risk involves potential remote code execution by an attacker, which could lead to server compromise and data breach. However, the supplier challenges the severity, placing responsibility on the administrator.
Recommendation
It is recommended to immediately update to the latest version of Umbraco CMS and implement strict server-side file validation as per the supplier's documentation.
Other vulnerabilities in Umbraco CMS
See all- CVE-2026-46616Medium
Umbraco is an ASP.NET CMS. Prior to versions 13.14.0 and 17.4.0, some Surface Controllers in the CMS fail to validate redirect URLs, making Razor templates that derive 'RedirectUrl' from user-controlled query parameters vulnerable to malicious redirect attacks.
- CVE-2021-47776Medium
A server-side request forgery vulnerability was found in Umbraco CMS v8.14.1. Attackers can manipulate baseUrl parameters in multiple dashboard and help controller endpoints, such as GetContextHelpForPage, GetRemoteDashboardContent, and GetRemoteDashboardCss, to trigger unauthorized server-side requests to external hosts.
- CVE-2024-55488Medium
A stored cross-site scripting (XSS) vulnerability in Umbraco CMS v14.3.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload. NOTE: This has been disputed by the vendor since this potential attack is only possible via authenticated users who have been manually allowed access to the CMS. There was a deliberate decision made not to apply HTML sanitization at the product level.
- CVE-2023-37267High
Umbraco, an ASP.NET CMS, can under rare conditions allow unauthorized users access to admin-level permissions after a restart. This vulnerability was patched in versions 10.6.1, 11.4.2, and 12.0.1.
Original NVD description (English source)
An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code by uploading a crafted PDF file. NOTE: this is disputed by the Supplier because the responsibility for file validation (as shown in the documentation) belongs to the system administrator who is implementing Umbraco CMS in their environment, not to Umbraco CMS itself. The Supplier also states that PDF JavaScript runs in a completely isolated sandbox, not the browser's DOM context, which means that privilege boundaries would not be crossed, a related issue to CVE-2023-49279.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS