# CVE-2025-55182: React2Shell - RCE

> Live exploitation tracking for CVE-2025-55182 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-55182

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 10.0
- **Public exploit available:** Yes
- **Affected products:** Meta react-server-dom-webpack, Meta react-server-dom-turbopack, Meta react-server-dom-parcel
- **Weaknesses:** CWE-502 (Deserialization of Untrusted Data)
- **Tags:** javascript, nodejs, web_application

## 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.

## CrowdSec analysis

[CVE-2025-55182](https://euvd.enisa.europa.eu/vulnerability/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.

## Timeline

- 2025-12-03: CVE Published. CVE-2025-55182 is published to NVD.
- 2025-12-04: Rule Released. CrowdSec releases a rule to detect CVE-2025-55182 exploitation attempts against the CrowdSec Network.
- 2025-12-04: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-55182 for the first time.
- 2025-12-05: CISA KEV. CVE-2025-55182 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2025-12-12: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).

## References

- http://www.openwall.com/lists/oss-security/2025/12/03/4
- https://www.facebook.com/security/advisories/cve-2025-55182
- https://react.dev/blog/2025/12/03/critical-security-vulnerability-in-react-server-components
- https://news.ycombinator.com/item?id=46136026

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-55182) follows observed exploitation activity for CVE-2025-55182. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.