diff --git a/endpoints/account/reset-password.php b/endpoints/account/reset-password.php
index 44c39b0b..c9abf6a8 100644
--- a/endpoints/account/reset-password.php
+++ b/endpoints/account/reset-password.php
@@ -25,7 +25,7 @@ class AccountresetpasswordResponse extends TemplateResponse
 
     protected array  $expectedGET  = array(
         'key'  => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[a-zA-Z0-9]{40}$/']],
-        'next' => ['filter' => FILTER_SANITIZE_URL,    'flags'   => FILTER_FLAG_STRIP_AOWOW            ]
+        'next' => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[[:print:]]+$/'   ]]
     );
     protected array  $expectedPOST = array(
         'key'        => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[a-zA-Z0-9]{40}$/']],
diff --git a/endpoints/account/signin.php b/endpoints/account/signin.php
index ffcd15b7..9beea099 100644
--- a/endpoints/account/signin.php
+++ b/endpoints/account/signin.php
@@ -28,7 +28,7 @@ class AccountSigninResponse extends TemplateResponse
     );
     protected array  $expectedGET  = array(
         'key'  => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[a-zA-Z0-9]{40}$/']],
-        'next' => ['filter' => FILTER_SANITIZE_URL,    'flags'   => FILTER_FLAG_STRIP_AOWOW            ]
+        'next' => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[[:print:]]+$/']   ]
     );
 
     private bool $success = false;
diff --git a/endpoints/account/signout.php b/endpoints/account/signout.php
index 7447f92e..67eaeacf 100644
--- a/endpoints/account/signout.php
+++ b/endpoints/account/signout.php
@@ -11,8 +11,8 @@ class AccountSignoutResponse extends TextResponse
     use TrGetNext;
 
     protected array $expectedGET = array(
-        'next'   => ['filter' => FILTER_SANITIZE_URL, 'flags' => FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH],
-        'global' => ['filter' => FILTER_CALLBACK,     'options' => [self::class, 'checkEmptySet']              ]
+        'next'   => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[[:print:]]+$/']],
+        'global' => ['filter' => FILTER_CALLBACK,        'options' => [self::class, 'checkEmptySet']  ]
     );
 
     public function __construct(string $pageParam)
diff --git a/endpoints/account/signup.php b/endpoints/account/signup.php
index 734832b1..5fd827b5 100644
--- a/endpoints/account/signup.php
+++ b/endpoints/account/signup.php
@@ -26,7 +26,7 @@ class AccountSignupResponse extends TemplateResponse
     );
 
     protected array  $expectedGET  = array(
-        'next' => ['filter' => FILTER_SANITIZE_URL, 'flags' => FILTER_FLAG_STRIP_AOWOW]
+        'next' => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[[:print:]]+$/']]
     );
 
     private bool $success = false;
diff --git a/endpoints/contactus/contactus.php b/endpoints/contactus/contactus.php
index 196ad9c6..ace3fa02 100644
--- a/endpoints/contactus/contactus.php
+++ b/endpoints/contactus/contactus.php
@@ -9,15 +9,15 @@ if (!defined('AOWOW_REVISION'))
 class ContactusBaseResponse extends TextResponse
 {
     protected array $expectedPOST = array(
-        'mode'       => ['filter' => FILTER_VALIDATE_INT                                         ],
-        'reason'     => ['filter' => FILTER_VALIDATE_INT                                         ],
-        'ua'         => ['filter' => FILTER_CALLBACK, 'options' => [self::class, 'checkTextLine']],
-        'appname'    => ['filter' => FILTER_CALLBACK, 'options' => [self::class, 'checkTextLine']],
-        'page'       => ['filter' => FILTER_SANITIZE_URL                                         ],
-        'desc'       => ['filter' => FILTER_CALLBACK, 'options' => [self::class, 'checkTextBlob']],
-        'id'         => ['filter' => FILTER_VALIDATE_INT                                         ],
-        'relatedurl' => ['filter' => FILTER_SANITIZE_URL                                         ],
-        'email'      => ['filter' => FILTER_SANITIZE_EMAIL                                       ]
+        'mode'       => ['filter' => FILTER_VALIDATE_INT                                                  ],
+        'reason'     => ['filter' => FILTER_VALIDATE_INT                                                  ],
+        'ua'         => ['filter' => FILTER_CALLBACK,        'options' => [self::class, 'checkTextLine']  ],
+        'appname'    => ['filter' => FILTER_CALLBACK,        'options' => [self::class, 'checkTextLine']  ],
+        'page'       => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[[:print:]]+$/']],
+        'desc'       => ['filter' => FILTER_CALLBACK,        'options' => [self::class, 'checkTextBlob']  ],
+        'id'         => ['filter' => FILTER_VALIDATE_INT                                                  ],
+        'relatedurl' => ['filter' => FILTER_VALIDATE_REGEXP, 'options' => ['regexp' => '/^[[:print:]]+$/']],
+        'email'      => ['filter' => FILTER_SANITIZE_EMAIL                                                ]
     );
 
     /* responses