Today marks the final CISA remediation deadline for the “React2Shell” vulnerability (CVE-2025-55182). This critical 10.0 CVSS flaw allows for unauthenticated remote code execution (RCE) on web servers. Intelligence suggests that threat actors are actively scanning for unpatched instances to deploy web shells before the holiday weekend concludes.
Business Impact
For a security consultant, this is a major liability check. Any public-facing web application built on React that remains unpatched is a direct gateway for ransomware and data exfiltration. Compliance failure here could lead to mandatory service shutdowns for federal partners.
Why It Happened
The flaw resides in the React Server Components (RSC) deserialization logic. Due to its ubiquity, it has become one of the most weaponized vulnerabilities of late 2025.
Recommended Executive Action
Verify that all internal and client-facing React applications have been migrated to the latest secure version. Conduct an immediate audit of web server logs for suspicious POST requests targeting the RSC endpoints.
Hashtags: #React2Shell #CISA #Vulnerability #RCE #CyberSecurity #PatchNow #InfoSec