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Burp Suite’s Scanning Arsenal Powered With Detection for Critical React2Shell Vulnerabilities

PortSwigger has introduced new capabilities to Burp Suite's ActiveScan++ extension, now capable of detecting critical vulnerabilities in the React2Shell framework, specifically CVE-2025-55182 and CVE-2025-66478 .

TBy Thomas BlakeDec 09, 20251 min read

PortSwigger has introduced new capabilities to Burp Suite's ActiveScan++ extension, now capable of detecting critical vulnerabilities in the React2Shell framework, specifically CVE-2025-55182 and CVE-2025-66478 .

The identified server-side request forgery (SSRF) vulnerability in React applications allows the execution of arbitrary shell commands, which can potentially lead to full remote code execution (RCE) on impacted servers.

These updates enable security researchers and penetration testers to identify zero-day risks during routine scans, thereby enhancing security measures against vulnerabilities that have already been exploited in production environments.

ActiveScan++ extends Burp Suite's scanning capabilities by adding low-overhead checks for advanced application behaviors. It identifies subtle issues that are often missed by standard scanners, including host header manipulations, password reset poisoning, cache poisoning, and DNS rebinding attacks.

The update includes coverage for prominent CVEs, such as React2Shell, Shellshock, and Log4Shell. It also introduces Unicode bypass detection, triggered passive scans during fuzzing, and insertion points for HTTP basic authentication.

ActiveScan++ extends Burp Suite's scanning capabilities by adding low-overhead checks for advanced application behaviors.
Thomas Blake · Thehackingpost

CVE ID Vulnerability CVSS v3.1 Score Affected Component

CVE-2025-55182 React2Shell SSRF-to-RCE 9.8 (Critical) React server endpoints

CVE-2025-66478 React2Shell SSRF-to-RCE 9.1 (Critical) React routing handlers

CVE-2021-44228 Log4Shell 10.0 (Critical) Log4j libraries

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CVE-2014-6271 Shellshock (Bash) 9.8 (Critical) Bash shells

Integration is straightforward: by initiating a standard Burp active scan, ActiveScan++ automatically executes all checks. Results are displayed in the scan dashboard, categorized by severity. It is recommended to exercise caution when performing host header tests on shared hosting, as they may inadvertently redirect to unintended applications.

This update is available for download from the BApp Store and addresses the increasing prevalence of SSRF exploits in React environments, emphasizing the need for developers to implement input sanitization and request whitelisting.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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