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CVE-2025-41243 PoC — Spring Expression Language property modification using Spring Cloud Gateway Server WebFlux

Source
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-41243.yaml
Associated Vulnerability
Title:Spring Expression Language property modification using Spring Cloud Gateway Server WebFlux (CVE-2025-41243)
Description:Spring Cloud Gateway Server Webflux may be vulnerable to Spring Environment property modification. An application should be considered vulnerable when all the following are true: * The application is using Spring Cloud Gateway Server Webflux (Spring Cloud Gateway Server WebMVC is not vulnerable). * Spring Boot actuator is a dependency. * The Spring Cloud Gateway Server Webflux actuator web endpoint is enabled via management.endpoints.web.exposure.include=gateway. * The actuator endpoints are available to attackers. * The actuator endpoints are unsecured.
Description
Spring Cloud Gateway Server Webflux contains a vulnerability caused by unsecured and exposed actuator endpoints allowing modification of Spring Environment properties, letting attackers modify configuration, exploit requires unsecured actuator endpoints exposure.
File Snapshot

 id: CVE-2025-41243

info:
  name: Spring Cloud Gateway Server Webflux - Broken Access Control
  auth

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