diff --git a/src/Umbraco.Core/Routing/WebPath.cs b/src/Umbraco.Core/Routing/WebPath.cs
index 7ecafff8a3..47c6b15871 100644
--- a/src/Umbraco.Core/Routing/WebPath.cs
+++ b/src/Umbraco.Core/Routing/WebPath.cs
@@ -50,4 +50,28 @@ public class WebPath
 
         return sb.ToString();
     }
+
+
+    /// <summary>
+    /// Determines whether the provided web path is well-formed according to the specified UriKind.
+    /// </summary>
+    /// <param name="webPath">The web path to check. This can be null.</param>
+    /// <param name="uriKind">The kind of Uri (Absolute, Relative, or RelativeOrAbsolute).</param>
+    /// <returns>
+    /// true if <paramref name="webPath"/> is well-formed; otherwise, false.
+    /// </returns>
+    public static bool IsWellFormedWebPath(string? webPath, UriKind uriKind)
+    {
+        if (string.IsNullOrWhiteSpace(webPath))
+        {
+            return false;
+        }
+
+        if (webPath.StartsWith("//"))
+        {
+            return uriKind is not UriKind.Relative;
+        }
+
+        return Uri.IsWellFormedUriString(webPath, uriKind);
+    }
 }
diff --git a/src/Umbraco.Web.BackOffice/Controllers/ImagesController.cs b/src/Umbraco.Web.BackOffice/Controllers/ImagesController.cs
index e718696ae3..71fa9625a6 100644
--- a/src/Umbraco.Web.BackOffice/Controllers/ImagesController.cs
+++ b/src/Umbraco.Web.BackOffice/Controllers/ImagesController.cs
@@ -7,6 +7,7 @@ using Umbraco.Cms.Core.Configuration.Models;
 using Umbraco.Cms.Core.IO;
 using Umbraco.Cms.Core.Media;
 using Umbraco.Cms.Core.Models;
+using Umbraco.Cms.Core.Routing;
 using Umbraco.Cms.Web.Common.Attributes;
 using Umbraco.Cms.Web.Common.DependencyInjection;
 using Umbraco.Extensions;
@@ -123,7 +124,7 @@ public class ImagesController : UmbracoAuthorizedApiController
 
     private bool IsAllowed(string encodedImagePath)
     {
-        if(Uri.IsWellFormedUriString(encodedImagePath, UriKind.Relative))
+        if(WebPath.IsWellFormedWebPath(encodedImagePath, UriKind.Relative))
         {
             return true;
         }
diff --git a/src/Umbraco.Web.BackOffice/Controllers/PreviewController.cs b/src/Umbraco.Web.BackOffice/Controllers/PreviewController.cs
index 19ca323d9d..17875c2950 100644
--- a/src/Umbraco.Web.BackOffice/Controllers/PreviewController.cs
+++ b/src/Umbraco.Web.BackOffice/Controllers/PreviewController.cs
@@ -11,6 +11,7 @@ using Umbraco.Cms.Core.Models;
 using Umbraco.Cms.Core.Models.Membership;
 using Umbraco.Cms.Core.Models.PublishedContent;
 using Umbraco.Cms.Core.PublishedCache;
+using Umbraco.Cms.Core.Routing;
 using Umbraco.Cms.Core.Security;
 using Umbraco.Cms.Core.Services;
 using Umbraco.Cms.Core.Web;
@@ -152,8 +153,7 @@ public class PreviewController : Controller
         // Expire Client-side cookie that determines whether the user has accepted to be in Preview Mode when visiting the website.
         _cookieManager.ExpireCookie(Constants.Web.AcceptPreviewCookieName);
 
-        if (Uri.IsWellFormedUriString(redir, UriKind.Relative)
-            && redir.StartsWith("//") == false
+        if (WebPath.IsWellFormedWebPath(redir, UriKind.Relative)
             && Uri.TryCreate(redir, UriKind.Relative, out Uri? url))
         {
             return Redirect(url.ToString());
diff --git a/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Routing/WebPathTests.cs b/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Routing/WebPathTests.cs
index 098e047981..acfa4ffe6f 100644
--- a/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Routing/WebPathTests.cs
+++ b/tests/Umbraco.Tests.UnitTests/Umbraco.Core/Routing/WebPathTests.cs
@@ -31,4 +31,87 @@ public class WebPathTests
 
     [Test]
     public void Combine_must_handle_null() => Assert.Throws<ArgumentNullException>(() => WebPath.Combine(null));
+
+
+    [Test]
+    [TestCase("ftp://hello.com/", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("file:///hello.com/", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("ws://hello.com/", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("wss://hello.com/", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("https://hello.com:8080/", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("http://hello.com:8080/", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path?query=param", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path?query=param", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path?query=param#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path?query=param#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("https://hello.com:8080/path?query=param#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("http://hello.com:8080/path?query=param#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("//hello.com:8080/path?query=param#fragment", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("//hello.com:8080/path", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("//hello.com:8080", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("//hello.com", UriKind.Absolute, ExpectedResult = true)]
+    [TestCase("/test/test.jpg", UriKind.Absolute, ExpectedResult = false)]
+    [TestCase("/test", UriKind.Absolute, ExpectedResult = false)]
+    [TestCase("test", UriKind.Absolute, ExpectedResult = false)]
+    [TestCase("", UriKind.Absolute, ExpectedResult = false)]
+    [TestCase(null, UriKind.Absolute, ExpectedResult = false)]
+    [TestCase("this is not welformed", UriKind.Absolute, ExpectedResult = false)]
+    [TestCase("ftp://hello.com/", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("file:///hello.com/", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("ws://hello.com/", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("wss://hello.com/", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("https://hello.com:8080/", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("http://hello.com:8080/", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("https://hello.com/path", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("http://hello.com/path", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("https://hello.com/path?query=param", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("http://hello.com/path?query=param", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("https://hello.com/path#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("http://hello.com/path#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("https://hello.com/path?query=param#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("http://hello.com/path?query=param#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("https://hello.com:8080/path?query=param#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("http://hello.com:8080/path?query=param#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("//hello.com:8080/path?query=param#fragment", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("//hello.com:8080/path", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("//hello.com:8080", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("//hello.com", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("/test/test.jpg", UriKind.Relative, ExpectedResult = true)]
+    [TestCase("/test", UriKind.Relative, ExpectedResult = true)]
+    [TestCase("test", UriKind.Relative, ExpectedResult = true)]
+    [TestCase("", UriKind.Relative, ExpectedResult = false)]
+    [TestCase(null, UriKind.Relative, ExpectedResult = false)]
+    [TestCase("this is not welformed", UriKind.Relative, ExpectedResult = false)]
+    [TestCase("ftp://hello.com/", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("file:///hello.com/", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("ws://hello.com/", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("wss://hello.com/", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("https://hello.com:8080/", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("http://hello.com:8080/", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path?query=param", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path?query=param", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("https://hello.com/path?query=param#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("http://hello.com/path?query=param#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("https://hello.com:8080/path?query=param#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("http://hello.com:8080/path?query=param#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("//hello.com:8080/path?query=param#fragment", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("//hello.com:8080/path", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("//hello.com:8080", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("//hello.com", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("/test/test.jpg", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("/test", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("test", UriKind.RelativeOrAbsolute, ExpectedResult = true)]
+    [TestCase("", UriKind.RelativeOrAbsolute, ExpectedResult = false)]
+    [TestCase(null, UriKind.RelativeOrAbsolute, ExpectedResult = false)]
+    [TestCase("this is not welformed", UriKind.RelativeOrAbsolute, ExpectedResult = false)]
+    public bool IsWellFormedWebPath(string? webPath, UriKind uriKind) => WebPath.IsWellFormedWebPath(webPath, uriKind);
+
 }