React2Shell - RCE (CVE-2025-55182)
Active exploitation with moderate targeting or momentum
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Description
A pre-authentication remote code execution vulnerability exists in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.
psychologyCrowdSec Analysis
CVE-2025-55182 is a critical vulnerability in React Server Components versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 including the following packages: react-server-dom-parcel, react-server-dom-turbopack, and react-server-dom-webpack. The vulnerable code unsafely deserializes payloads from HTTP requests to Server Function endpoints.
CrowdSec has been tracking this vulnerability and its exploits since 4th of December 2025.
CrowdSec network data shows that most actors exploiting CVE-2025-55182 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature. CrowdSec data also reveals a clear uptick in attacks involving CVE-2025-55182 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.
Attackers can exploit this vulnerability by sending specially crafted HTTP requests to Server Function endpoints in React Server Components. By manipulating the payloads, they can trigger unsafe deserialization, leading to remote code execution on the affected server without requiring authentication.
Exploitation Timeline
groupSignals collected from the CrowdSec community network.
| Event | Date |
|---|---|
| CVE Published | 2025-12-03 |
| Rule Released | 2025-12-04 |
| CrowdSec First Seen | 2025-12-04 |
| CISA KEV | 2025-12-05 |
| CISA Remediation Deadline | 2025-12-12 |
| Active Exploitationtrending_downBackground Noise | 2026-06-01 |
Active Attackers
Unique IPs observed exploiting this CVE in the last 14 days.
Remediation & Protection
codeAPI Access
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