Fix CookieRequestCache parameters

Previously the parameters were not restored.

This commit ensures the parameters are restored.

Closes gh-18204

Signed-off-by: Vishnutheep B <vishnutheep@gmail.com>

web/src/main/java/org/springframework/security/web/savedrequest/CookieRequestCache.java

@@ -91,6 +91,7 @@ public class CookieRequestCache implements RequestCache {
 			.setServerPort(port)
 			.setMethod(request.getMethod())
 			.setLocales(Collections.list(request.getLocales()))
+			.setParameters(request.getParameterMap())
 			.build();
 	}
 

web/src/test/java/org/springframework/security/web/savedrequest/CookieRequestCacheTests.java

@@ -108,6 +108,21 @@ public class CookieRequestCacheTests {
 		assertThat(savedRequest.getRedirectUrl()).isEqualTo(redirectUrl);
 	}
 
+	@Test
+	public void getRequestWhenRequestContainsSavedRequestCookieThenSavedRequestContainsRequestParameters() {
+		CookieRequestCache cookieRequestCache = new CookieRequestCache();
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		request.setCookies(new Cookie(DEFAULT_COOKIE_NAME, encodeCookie("https://abc.com/destination")));
+		request.setParameter("single", "first");
+		request.addParameter("multi", "second");
+		request.addParameter("multi", "third");
+		SavedRequest savedRequest = cookieRequestCache.getRequest(request, new MockHttpServletResponse());
+		assertThat(savedRequest).isNotNull();
+		assertThat(savedRequest.getParameterValues("single")).containsExactly("first");
+		assertThat(savedRequest.getParameterValues("multi")).containsExactly("second", "third");
+		assertThat(savedRequest.getParameterMap()).containsKeys("single", "multi");
+	}
+
 	@Test
 	public void matchingRequestWhenRequestDoesNotContainSavedRequestCookieThenReturnsNull() {
 		CookieRequestCache cookieRequestCache = new CookieRequestCache();