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.
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.