Threats tagged 'app router'

CVE-2025-55182, known as React2Shell, is a critical vulnerability in React Server Components affecting React versions 19.x and Next.js versions 15.x and 16.x when using App Router. It has a maximum CVSS score of 10.0. Multiple China state-nexus threat groups, including Earth Lamia and Jackpot Panda, rapidly exploited this vulnerability within hours of its public disclosure on December 3, 2025. Public exploit code is available through Metasploit and Exploit-DB, and the vulnerability has been added to the CISA KEV catalog. Fixed versions include React 20.0.0 and Next.js 17.0.0 and later.