ID:12183 - Exploit for Deserialization of untrusted data in Next.js - CVE-2025-66478

Link to public exploit:

Vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the React's App Router. A remote non-authenticated attacker can send specially crafted HTTP request to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, vulnerability in the react server component is tracked as a separate vulnerability #VU119103 (CVE-2025-55182).

Remediation