take a Vaadin 24.2.0.beta2 project from start.vaadin.com
add appsec-kit-v24 1.1.0.beta1 and configure it
install a vulnerability with npm i pac-resolver@4.0.0
start the app and check the app sec kit view, you will get the NPE below
2023-10-04T14:17:20.830+02:00 INFO 85808 --- [nio-8080-exec-7] c.v.a.v24.service.AppSecDevToolsPlugin : Plugin connected
2023-10-04T14:17:23.068+02:00 ERROR 85808 --- [nio-8080-exec-9] c.v.flow.router.InternalServerError : There was an exception while trying to navigate to 'vaadin-appsec-kit'
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.vaadin.appsec.v24.views.AppSecView': Failed to instantiate [com.vaadin.appsec.v24.views.AppSecView]: Constructor threw exception
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:321) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:560) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:320) ~[spring-beans-6.0.12.jar:6.0.12]
at com.vaadin.flow.spring.SpringInstantiator.getOrCreate(SpringInstantiator.java:126) ~[vaadin-spring-24.2.0.beta2.jar:na]
at com.vaadin.flow.di.Instantiator.createRouteTarget(Instantiator.java:136) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.lambda$getRouteTarget$1(AbstractNavigationStateRenderer.java:132) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at java.base/java.util.Optional.orElseGet(Optional.java:364) ~[na:na]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.getRouteTarget(AbstractNavigationStateRenderer.java:131) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.sendBeforeEnterEventAndPopulateChain(AbstractNavigationStateRenderer.java:480) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.createChainIfEmptyAndExecuteBeforeEnterNavigation(AbstractNavigationStateRenderer.java:461) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.handle(AbstractNavigationStateRenderer.java:211) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.component.internal.JavaScriptNavigationStateRenderer.handle(JavaScriptNavigationStateRenderer.java:78) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.component.UI.handleNavigation(UI.java:1834) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.component.UI.renderViewForRoute(UI.java:1797) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.component.UI.connectClient(UI.java:1710) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:227) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:204) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.invokeMethod(PublishedServerEventHandlerRpcHandler.java:150) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.rpc.PublishedServerEventHandlerRpcHandler.handleNode(PublishedServerEventHandlerRpcHandler.java:133) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.rpc.AbstractRpcInvocationHandler.handle(AbstractRpcInvocationHandler.java:74) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.ServerRpcHandler.handleInvocationData(ServerRpcHandler.java:459) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.ServerRpcHandler.lambda$handleInvocations$2(ServerRpcHandler.java:440) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
at com.vaadin.flow.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:440) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:323) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:114) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1522) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:398) ~[flow-server-24.2.0.beta2.jar:24.2.0.beta2]
at com.vaadin.flow.spring.SpringServlet.service(SpringServlet.java:106) ~[vaadin-spring-24.2.0.beta2.jar:na]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-10.1.13.jar:6.0]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:642) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:408) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:313) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:277) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.springframework.web.servlet.mvc.ServletForwardingController.handleRequestInternal(ServletForwardingController.java:141) ~[spring-webmvc-6.0.12.jar:6.0.12]
at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:178) ~[spring-webmvc-6.0.12.jar:6.0.12]
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:51) ~[spring-webmvc-6.0.12.jar:6.0.12]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081) ~[spring-webmvc-6.0.12.jar:6.0.12]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974) ~[spring-webmvc-6.0.12.jar:6.0.12]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1011) ~[spring-webmvc-6.0.12.jar:6.0.12]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914) ~[spring-webmvc-6.0.12.jar:6.0.12]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590) ~[tomcat-embed-core-10.1.13.jar:6.0]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) ~[spring-webmvc-6.0.12.jar:6.0.12]
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-10.1.13.jar:6.0]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-6.0.12.jar:6.0.12]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.0.12.jar:6.0.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-6.0.12.jar:6.0.12]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.0.12.jar:6.0.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-6.0.12.jar:6.0.12]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.0.12.jar:6.0.12]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:894) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1740) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-10.1.13.jar:10.1.13]
at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.vaadin.appsec.v24.views.AppSecView]: Constructor threw exception
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:224) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:110) ~[spring-beans-6.0.12.jar:6.0.12]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:318) ~[spring-beans-6.0.12.jar:6.0.12]
... 87 common frames omitted
Caused by: java.lang.NullPointerException: Cannot invoke "java.util.List.contains(Object)" because the return value of "com.vaadin.appsec.backend.model.osv.response.Affected.getVersions()" is null
at com.vaadin.appsec.backend.AppSecDTOProvider.getVulnerabilities(AppSecDTOProvider.java:125) ~[appsec-kit-backend-1.1.0.beta1.jar:na]
at com.vaadin.appsec.backend.AppSecService.getVulnerabilities(AppSecService.java:291) ~[appsec-kit-backend-1.1.0.beta1.jar:na]
at com.vaadin.appsec.v24.views.VulnerabilitiesTab.refresh(VulnerabilitiesTab.java:110) ~[appsec-kit-v24-1.1.0.beta1.jar:na]
at com.vaadin.appsec.v24.views.AppSecView.refresh(AppSecView.java:124) ~[appsec-kit-v24-1.1.0.beta1.jar:na]
at com.vaadin.appsec.v24.views.AppSecView.<init>(AppSecView.java:62) ~[appsec-kit-v24-1.1.0.beta1.jar:na]
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[na:na]
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[na:na]
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:198) ~[spring-beans-6.0.12.jar:6.0.12]
... 89 common frames omitted