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New Tools for Exploiting React Server Components Vulnerability

First seen 22 Sep 2026, 09:52 UTC • •51.1

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ThreatCluster •September 23, 2026 at 08:58 UTC

•New tools released for detecting RSC vulnerabilities, including CVE-2025-55183.
•RSC-Scanner performs automated scans for code disclosure vulnerabilities.
•RSC_Detector Chrome extension identifies RSC fingerprints on web pages.

A new scanner and Chrome extension have been released to detect vulnerabilities in React Server Components (RSC), specifically targeting the CVE-2025-55183 vulnerability. The RSC-Scanner can automatically scan URLs for code disclosure vulnerabilities, while the RSC_Detector Chrome extension identifies RSC fingerprints on web pages. CVE-2025-55183, which was published on December 11, 2025, allows attackers to exploit vulnerable server functions to retrieve sensitive source code. Both tools are intended for security research and educational purposes, emphasizing ethical use. The tools utilize various detection methods, including HTTP request analysis and content-type checks. Security professionals are advised to be aware of these tools and the underlying vulnerabilities they target.

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Timeline

2025-12-11

CVE-2025-55183 published

A vulnerability in React Server Components allowing code disclosure was published, impacting various applications.

2025-12-12

First public PoC released

Proof-of-concept code for CVE-2025-55183 was made publicly available, enabling further exploration of the vulnerability.

2026-09-19

RSC-Scanner released

A scanner tool was released to detect vulnerabilities related to CVE-2025-55183 in React Server Components.

2026-09-22

RSC_Detector Chrome extension released

A Chrome extension was launched to detect RSC fingerprints and assist in identifying vulnerabilities on web pages.

More articles in this cluster (2)

Threat Graph

4 entities, 3 inferred relationships (STIX 2.1).

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Vulnerability (1)

CVE-2025-55183

Weakness (1)

CWE-200 - Exposure of Sensitive Information

Tool (2)

Scanner.py
Tqdm

Relationships

Scanner.py exploits CVE-2025-55183
Tqdm exploits CVE-2025-55183
CVE-2025-55183 related to CWE-200 - Exposure of Sensitive Information

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