Fixed http://opensource.atlassian.com/projects/spring/browse/SEC-445

Import servlet-api 2.4 in order to bring in the correct PageContext class

core/pom.xml

@@ -84,7 +84,13 @@
       <version>2.0</version>
       <optional>true</optional>
     </dependency>
-   <dependency>
+    <dependency>
+      <groupId>javax.servlet</groupId>
+      <artifactId>servlet-api</artifactId>
+      <version>2.4</version>
+      <optional>true</optional>
+    </dependency>
+    <dependency>
       <groupId>taglibs</groupId>
       <artifactId>standard</artifactId>
       <version>1.0.6</version>