#VU120002 Prototype pollution in Happy DOM - CVE-2025-62410
Published: December 16, 2025
Vulnerability identifier: #VU120002
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-62410
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Happy DOM
Happy DOM
Software vendor:
capricorn86
capricorn86
Description
The vulnerability allows a remote attacker to execute arbitrary JavaScript code.
The vulnerability exists due to improper input validation. A remote attacker can pass specially crafted input to the application, bypass the --disallow-code-generation-from-strings option and perform prototype pollution, which can result in information disclosure or data manipulation.
Note, the vulnerability exists due to incomplete fix for #VU120001 (CVE-2025-61927).
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..