HeyForm versions prior to 3.0.0-rc.9 contain critical authentication and file upload vulnerabilities that enable unauthenticated remote code execution.

The software fails to enforce authentication for sensitive operations and allows the upload of dangerous file types. An unauthenticated attacker can exploit these weaknesses to bypass security controls and upload malicious files to the server.

This vulnerability carries a high CVSS score of 8.6 because it allows unauthenticated attackers to gain unauthorized access and potentially execute arbitrary code. The ability to upload dangerous file types can lead to complete server takeover, leading to data breaches, loss of intellectual property, and significant reputational damage.

Immediate Action: Update HeyForm to version 3.0.0-rc.9 or later immediately to resolve the authentication and file upload restrictions.

Proactive Monitoring: Monitor the server for the presence of unexpected files in upload directories and inspect server access logs for requests to non-public endpoints.

Compensating Controls: Implement strict file extension filtering and content-type validation at the Web Application Firewall or reverse proxy layer to prevent the upload of executable or script files.

Public Exploit Available: Unknown

This is a critical security issue that requires immediate attention due to the unauthenticated nature of the attack. Organizations running HeyForm must upgrade to the patched version 3.0.0-rc.9 as a priority to secure their infrastructure against potential compromise.