diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3da3705..58fbd12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,13 @@
 All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 
+## [3.3.0] - 2024-01-24
+### Added
+- Support for custom cookie header
+
+### Fixed
+- first-party XHR url validation
+
 ## [3.2.2] - 2023-08-02
 ### Fixed
 - Added firstPartyEnabled field to advanced blocking response
diff --git a/PerimeterXModule/Internals/PxContext.cs b/PerimeterXModule/Internals/PxContext.cs
index 1d0c799..cca8ef4 100644
--- a/PerimeterXModule/Internals/PxContext.cs
+++ b/PerimeterXModule/Internals/PxContext.cs
@@ -148,9 +148,19 @@ public PxContext(HttpContext context, PxModuleConfigurationSection pxConfigurati
 			else
 			{
 				// Case its not mobile token
+				if (pxConfiguration.CustomCookieHeader != null)
+				{
+					string customCookieHeaderValue = context.Request.Headers[pxConfiguration.CustomCookieHeader];
+
+					if (customCookieHeaderValue != null)
+					{
+						addCookiesToDict(customCookieHeaderValue, PxCookies);
+					}
+				}
+
 				foreach (string key in contextCookie.AllKeys)
 				{
-					if (Array.IndexOf(PxConstants.PX_COOKIES_PREFIX, key) > -1)
+					if (!PxCookies.ContainsKey(key) && Array.IndexOf(PxConstants.PX_COOKIES_PREFIX, key) > -1)
 					{
 						PxCookies[key] = contextCookie.Get(key).Value;
 					}
@@ -268,6 +278,24 @@ private string ExtractHttpVersion(HttpContext context)
 			return serverProtocol;
 		}
 
+		private void addCookiesToDict(string customHeaderValue, Dictionary<string, string> cookiesDict)
+		{
+			var cookieArray = customHeaderValue.Trim().Split(';');
+			foreach (var cookie in cookieArray)
+			{
+				if (cookie != null)
+				{
+					var cookieSeperatorIndex = cookie.IndexOf('=');
+					if (cookieSeperatorIndex > 0)
+					{
+						string cookieName = cookie.Substring(0, cookieSeperatorIndex);
+						string cookieValue = cookie.Substring(cookieSeperatorIndex + 1);
+						cookiesDict.Add(cookieName, cookieValue);
+					}
+				}
+			}
+		}
+
 		public string GetPxCookie()
 		{
 			if (PxCookies.Count == 0)
diff --git a/PerimeterXModule/Internals/ReverseProxy.cs b/PerimeterXModule/Internals/ReverseProxy.cs
index ddb5251..fb94ad4 100644
--- a/PerimeterXModule/Internals/ReverseProxy.cs
+++ b/PerimeterXModule/Internals/ReverseProxy.cs
@@ -5,6 +5,7 @@
 using System.Net;
 using System.Text;
 using System.Web;
+using System.Text.RegularExpressions;
 
 namespace PerimeterX
 {
@@ -175,7 +176,16 @@ public void ReversePxXhr(HttpContext context)
 				RenderPredefinedResponse(context, contentType, defaultResponse);
 				return;
 			}
-			string uri = context.Request.RawUrl.Replace(XhrReversePrefix, "");
+
+			string pathName = context.Request.Path.Replace(XhrReversePrefix, "");
+			string url = CollectorUrl + pathName + context.Request.QueryString;
+			string host = Regex.Replace(CollectorUrl, "https?:\\/\\/", "");
+			if (!isValidThirdPartyUrl(url, host, pathName))
+			{
+				PxLoggingUtils.LogDebug(string.Format("First party XHR URL is inaccurate: {0}, rendreing default response", url));
+				RenderPredefinedResponse(context, contentType, defaultResponse);
+				return;
+			}
 
 			string vid = null;
 			HttpCookie pxvid = context.Request.Cookies.Get("pxvid");
@@ -212,7 +222,7 @@ public void ReversePxXhr(HttpContext context)
 				context.Request.Headers.Add("Cookie", string.Format("pxvid={0}", vid));
 			}
 
-			bool success = ProcessRequest(context, CollectorUrl, uri);
+			bool success = ProcessRequest(context, CollectorUrl, pathName);
 			if (!success)
 			{
 				PxLoggingUtils.LogDebug("Redirect XHR returned bad status, rendering default response");
@@ -296,6 +306,17 @@ private void RenderPredefinedResponse(HttpContext context, string contentType, s
 			context.Response.End();
 		}
 
-		
+		public bool isValidThirdPartyUrl(string url, string expectedHost, string expectedPath)
+		{
+			try
+			{
+				Uri uri = new Uri(url);
+				return uri.Host.ToLower() == expectedHost.ToLower() && uri.PathAndQuery.StartsWith(expectedPath);
+			}
+			catch (Exception e)
+			{
+				return false;
+			}
+		}
 	}
 }
diff --git a/PerimeterXModule/Properties/AssemblyInfo.cs b/PerimeterXModule/Properties/AssemblyInfo.cs
index 802943c..1355962 100644
--- a/PerimeterXModule/Properties/AssemblyInfo.cs
+++ b/PerimeterXModule/Properties/AssemblyInfo.cs
@@ -23,5 +23,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("3.2.2")]
-[assembly: AssemblyFileVersion("3.2.2")]
+[assembly: AssemblyVersion("3.3.0")]
+[assembly: AssemblyFileVersion("3.3.0")]
diff --git a/PerimeterXModule/PxModuleConfigurationSection.cs b/PerimeterXModule/PxModuleConfigurationSection.cs
index 5fdf5a3..0029695 100644
--- a/PerimeterXModule/PxModuleConfigurationSection.cs
+++ b/PerimeterXModule/PxModuleConfigurationSection.cs
@@ -188,6 +188,19 @@ public string BaseUri
             }
         }
 
+        [ConfigurationProperty("customCookieHeader", DefaultValue = "x-px-cookies")]
+        public string CustomCookieHeader
+        {
+            get
+            {
+                return (string)this["customCookieHeader"];
+            }
+            set
+            {
+                this["customCookieHeader"] = value;
+            }
+        }
+
         [ConfigurationProperty("apiTimeout", DefaultValue = 1500)]
         public int ApiTimeout
         {
diff --git a/README.md b/README.md
index 006e7fc..fa69c11 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [PerimeterX](http://www.perimeterx.com) ASP.NET SDK
 ===================================================
 
-> Latest stable version: [v3.2.2](https://www.nuget.org/packages/PerimeterXModule/3.2.1)
+> Latest stable version: [v3.3.0](https://www.nuget.org/packages/PerimeterXModule/3.2.1)
 
 Table of Contents
 -----------------
@@ -32,6 +32,7 @@ Table of Contents
   *   [Monitor Mode](#monitor-mode)
   *   [Base URI](#base-uri)
   *   [Override UA header](#override-ua)
+  *   [Custom Cookie Header](#customCookieHeader)
   *   [Mitigation Urls](#mitigiation-urls)
   *   [Test Block Flow on Monitoring Mode](#bypass-monitor-header)
 
@@ -424,6 +425,18 @@ The user's user agent can be returned to the PerimeterX module using a name of a
 ...
 ```
 
+#### <a name="customCookieHeader"></a>Custom Cookie Header
+
+When set, instead of extrating the PerimeterX Cookie from the `Cookie` header, this property specifies a header name that will contain the PerimeterX Cookie.
+
+**Default:** x-px-cookies
+
+```xml
+  ...
+  customCookieHeader: "some-header-name"
+  ...
+```
+
 #### <a name="data-enrichment"></a> Data Enrichment
 
 Users can use the additional activity handler to retrieve information for the request using the data-enrichment object. First, check that the data enrichment object is verified, then you can access it's properties.
diff --git a/px_metadata.json b/px_metadata.json
index 4c7ce7b..6d19928 100644
--- a/px_metadata.json
+++ b/px_metadata.json
@@ -1,5 +1,5 @@
 {
-    "version": "3.2.2",
+    "version": "3.3.0",
     "supported_features": [
         "additional_activity_handler",
         "advanced_blocking_response",