diff --git a/buffer/buffer.php b/buffer/buffer.php
index 61582feb..6be69ca8 100644
--- a/buffer/buffer.php
+++ b/buffer/buffer.php
@@ -17,7 +17,6 @@ use Friendica\Core\Renderer;
 use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Util\Proxy as ProxyUtils;
-use Friendica\Util\Strings;
 
 function buffer_install()
 {
@@ -74,8 +73,8 @@ function buffer_addon_admin(App $a, &$o)
 
 function buffer_addon_admin_post(App $a)
 {
-	$client_id     = (!empty($_POST['client_id'])     ? Strings::escapeTags(trim($_POST['client_id']))     : '');
-	$client_secret = (!empty($_POST['client_secret']) ? Strings::escapeTags(trim($_POST['client_secret'])) : '');
+	$client_id     = (!empty($_POST['client_id'])     ? trim($_POST['client_id'])     : '');
+	$client_secret = (!empty($_POST['client_secret']) ? trim($_POST['client_secret']) : '');
 
 	DI::config()->set('buffer', 'client_id'    , $client_id);
 	DI::config()->set('buffer', 'client_secret', $client_secret);
diff --git a/forumdirectory/forumdirectory.php b/forumdirectory/forumdirectory.php
index cf65bcc1..25460def 100644
--- a/forumdirectory/forumdirectory.php
+++ b/forumdirectory/forumdirectory.php
@@ -66,9 +66,9 @@ function forumdirectory_content(App $a)
 	Nav::setSelected('directory');
 
 	if (!empty($forumdirectory_search)) {
-		$search = Strings::escapeTags(trim($forumdirectory_search));
+		$search = trim($forumdirectory_search);
 	} else {
-		$search = (!empty($_GET['search']) ? Strings::escapeTags(trim(rawurldecode($_GET['search']))) : '');
+		$search = (!empty($_GET['search']) ? trim(rawurldecode($_GET['search'])) : '');
 	}
 
 	$gdirpath = '';
diff --git a/geocoordinates/geocoordinates.php b/geocoordinates/geocoordinates.php
index 83767918..08b45cec 100644
--- a/geocoordinates/geocoordinates.php
+++ b/geocoordinates/geocoordinates.php
@@ -10,7 +10,6 @@ use Friendica\Core\Hook;
 use Friendica\Core\Logger;
 use Friendica\Core\Renderer;
 use Friendica\DI;
-use Friendica\Util\Strings;
 
 function geocoordinates_install()
 {
@@ -91,9 +90,9 @@ function geocoordinates_addon_admin(&$a, &$o)
 
 function geocoordinates_addon_admin_post(&$a)
 {
-	$api_key  = (!empty($_POST['api_key']) ? Strings::escapeTags(trim($_POST['api_key']))   : '');
+	$api_key  = (!empty($_POST['api_key']) ? trim($_POST['api_key']) : '');
 	DI::config()->set('geocoordinates', 'api_key', $api_key);
 
-	$language  = (!empty($_POST['language']) ? Strings::escapeTags(trim($_POST['language']))   : '');
+	$language  = (!empty($_POST['language']) ? trim($_POST['language']) : '');
 	DI::config()->set('geocoordinates', 'language', $language);
 }
diff --git a/gravatar/gravatar.php b/gravatar/gravatar.php
index 1b6c8e09..3846d973 100644
--- a/gravatar/gravatar.php
+++ b/gravatar/gravatar.php
@@ -108,8 +108,8 @@ function gravatar_addon_admin (&$a, &$o) {
 function gravatar_addon_admin_post (&$a) {
 	BaseModule::checkFormSecurityToken('gravatarsave');
 
-	$default_avatar = (!empty($_POST['avatar']) ? Strings::escapeTags(trim($_POST['avatar'])) : 'identicon');
-	$rating = (!empty($_POST['rating']) ? Strings::escapeTags(trim($_POST['rating'])) : 'g');
+	$default_avatar = (!empty($_POST['avatar']) ? trim($_POST['avatar']) : 'identicon');
+	$rating = (!empty($_POST['rating']) ? trim($_POST['rating']) : 'g');
 	DI::config()->set('gravatar', 'default_avatar', $default_avatar);
 	DI::config()->set('gravatar', 'rating', $rating);
 }
diff --git a/impressum/impressum.php b/impressum/impressum.php
index 26fec48b..3bdc2465 100644
--- a/impressum/impressum.php
+++ b/impressum/impressum.php
@@ -14,7 +14,6 @@ use Friendica\Core\Renderer;
 use Friendica\DI;
 use Friendica\Core\Config\Util\ConfigFileLoader;
 use Friendica\Util\Proxy as ProxyUtils;
-use Friendica\Util\Strings;
 
 function impressum_install() {
 	Hook::register('load_config', 'addon/impressum/impressum.php', 'impressum_load_config');
@@ -79,11 +78,11 @@ function impressum_show($a,&$b) {
 }
 
 function impressum_addon_admin_post (&$a) {
-    $owner = (!empty($_POST['owner']) ? Strings::escapeTags(trim($_POST['owner'])) : '');
-    $ownerprofile = (!empty($_POST['ownerprofile']) ? Strings::escapeTags(trim($_POST['ownerprofile'])) : '');
+    $owner = (!empty($_POST['owner']) ? trim($_POST['owner']) : '');
+    $ownerprofile = (!empty($_POST['ownerprofile']) ? trim($_POST['ownerprofile']) : '');
     $postal = (!empty($_POST['postal']) ? (trim($_POST['postal'])) : '');
     $notes = (!empty($_POST['notes']) ? (trim($_POST['notes'])) : '');
-    $email = (!empty($_POST['email']) ? Strings::escapeTags(trim($_POST['email'])) : '');
+    $email = (!empty($_POST['email']) ? trim($_POST['email']) : '');
     $footer_text = (!empty($_POST['footer_text']) ? (trim($_POST['footer_text'])) : '');
     DI::config()->set('impressum','owner',strip_tags($owner));
     DI::config()->set('impressum','ownerprofile',strip_tags($ownerprofile));
diff --git a/libravatar/libravatar.php b/libravatar/libravatar.php
index 5e31ea9d..d702874b 100644
--- a/libravatar/libravatar.php
+++ b/libravatar/libravatar.php
@@ -13,7 +13,6 @@ use Friendica\Core\Logger;
 use Friendica\Core\Renderer;
 use Friendica\DI;
 use Friendica\Core\Config\Util\ConfigFileLoader;
-use Friendica\Util\Strings;
 
 /**
  * Installs the addon hook
@@ -90,6 +89,6 @@ function libravatar_addon_admin(&$a, &$o)
  */
 function libravatar_addon_admin_post(&$a)
 {
-	$default_avatar = (!empty($_POST['avatar']) ? Strings::escapeTags(trim($_POST['avatar'])) : 'identicon');
+	$default_avatar = (!empty($_POST['avatar']) ? trim($_POST['avatar']) : 'identicon');
 	DI::config()->set('libravatar', 'default_avatar', $default_avatar);
 }
diff --git a/newmemberwidget/newmemberwidget.php b/newmemberwidget/newmemberwidget.php
index a040ec31..c6122a52 100644
--- a/newmemberwidget/newmemberwidget.php
+++ b/newmemberwidget/newmemberwidget.php
@@ -11,7 +11,6 @@ use Friendica\Core\Hook;
 use Friendica\Core\Logger;
 use Friendica\Core\Renderer;
 use Friendica\DI;
-use Friendica\Util\Strings;
 
 function newmemberwidget_install()
 {
@@ -49,7 +48,7 @@ function newmemberwidget_network_mod_init ($a, $b)
 function newmemberwidget_addon_admin_post(&$a)
 {
 	$ft = (!empty($_POST['freetext']) ? trim($_POST['freetext']) : "");
-	$lsn = (!empty($_POST['localsupportname']) ? Strings::escapeTags(trim($_POST['localsupportname'])) : "");
+	$lsn = (!empty($_POST['localsupportname']) ? trim($_POST['localsupportname']) : "");
 	$gs = intval($_POST['linkglobalsupport']);
 	$ls = intval($_POST['linklocalsupport']);
 	DI::config()->set('newmemberwidget', 'freetext',           trim($ft));
diff --git a/piwik/piwik.php b/piwik/piwik.php
index 071fd337..4035f467 100644
--- a/piwik/piwik.php
+++ b/piwik/piwik.php
@@ -36,7 +36,6 @@ use Friendica\Core\Logger;
 use Friendica\Core\Renderer;
 use Friendica\DI;
 use Friendica\Core\Config\Util\ConfigFileLoader;
-use Friendica\Util\Strings;
 
 function piwik_install() {
 	Hook::register('load_config', 'addon/piwik/piwik.php', 'piwik_load_config');
@@ -102,7 +101,7 @@ function piwik_addon_admin (&$a, &$o) {
 	]);
 }
 function piwik_addon_admin_post (&$a) {
-	$url = (!empty($_POST['baseurl']) ? Strings::escapeTags(trim($_POST['baseurl'])) : '');
+	$url = (!empty($_POST['baseurl']) ? trim($_POST['baseurl']) : '');
 	$id = (!empty($_POST['siteid']) ? trim($_POST['siteid']) : '');
 	$optout = (!empty($_POST['optout']) ? trim($_POST['optout']) : '');
 	$async = (!empty($_POST['async']) ? trim($_POST['async']) : '');
diff --git a/public_server/public_server.php b/public_server/public_server.php
index 0c370981..97e4b785 100644
--- a/public_server/public_server.php
+++ b/public_server/public_server.php
@@ -17,7 +17,6 @@ use Friendica\Model\Notification;
 use Friendica\Model\User;
 use Friendica\Core\Config\Util\ConfigFileLoader;
 use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Strings;
 
 function public_server_install()
 {
@@ -126,12 +125,12 @@ function public_server_login($a, $b)
 function public_server_addon_admin_post(&$a)
 {
 	BaseModule::checkFormSecurityTokenRedirectOnError('/admin/addons/publicserver', 'publicserver');
-	$expiredays = (!empty($_POST['expiredays']) ? Strings::escapeTags(trim($_POST['expiredays'])) : '');
-	$expireposts = (!empty($_POST['expireposts']) ? Strings::escapeTags(trim($_POST['expireposts'])) : '');
-	$nologin = (!empty($_POST['nologin']) ? Strings::escapeTags(trim($_POST['nologin'])) : '');
-	$flagusers = (!empty($_POST['flagusers']) ? Strings::escapeTags(trim($_POST['flagusers'])) : '');
-	$flagposts = (!empty($_POST['flagposts']) ? Strings::escapeTags(trim($_POST['flagposts'])) : '');
-	$flagpostsexpire = (!empty($_POST['flagpostsexpire']) ? Strings::escapeTags(trim($_POST['flagpostsexpire'])) : '');
+	$expiredays = (!empty($_POST['expiredays']) ? trim($_POST['expiredays']) : '');
+	$expireposts = (!empty($_POST['expireposts']) ? trim($_POST['expireposts']) : '');
+	$nologin = (!empty($_POST['nologin']) ? trim($_POST['nologin']) : '');
+	$flagusers = (!empty($_POST['flagusers']) ? trim($_POST['flagusers']) : '');
+	$flagposts = (!empty($_POST['flagposts']) ? trim($_POST['flagposts']) : '');
+	$flagpostsexpire = (!empty($_POST['flagpostsexpire']) ? trim($_POST['flagpostsexpire']) : '');
 	DI::config()->set('public_server', 'expiredays', $expiredays);
 	DI::config()->set('public_server', 'expireposts', $expireposts);
 	DI::config()->set('public_server', 'nologin', $nologin);
diff --git a/tumblr/tumblr.php b/tumblr/tumblr.php
index 0359d953..a6c598b3 100644
--- a/tumblr/tumblr.php
+++ b/tumblr/tumblr.php
@@ -18,7 +18,6 @@ use Friendica\Database\DBA;
 use Friendica\DI;
 use Friendica\Model\Post;
 use Friendica\Model\Tag;
-use Friendica\Util\Strings;
 
 function tumblr_install()
 {
@@ -76,8 +75,8 @@ function tumblr_addon_admin(App $a, &$o)
 
 function tumblr_addon_admin_post(App $a)
 {
-	$consumer_key    =       (!empty($_POST['consumer_key'])      ? Strings::escapeTags(trim($_POST['consumer_key']))   : '');
-	$consumer_secret =       (!empty($_POST['consumer_secret'])   ? Strings::escapeTags(trim($_POST['consumer_secret'])): '');
+	$consumer_key    = (!empty($_POST['consumer_key'])    ? trim($_POST['consumer_key'])   : '');
+	$consumer_secret = (!empty($_POST['consumer_secret']) ? trim($_POST['consumer_secret']): '');
 
 	DI::config()->set('tumblr', 'consumer_key',$consumer_key);
 	DI::config()->set('tumblr', 'consumer_secret',$consumer_secret);
diff --git a/twitter/twitter.php b/twitter/twitter.php
index 6f53b2e4..c6215fab 100644
--- a/twitter/twitter.php
+++ b/twitter/twitter.php
@@ -791,8 +791,8 @@ function twitter_post_hook(App $a, array &$b)
 
 function twitter_addon_admin_post(App $a)
 {
-	$consumerkey    = !empty($_POST['consumerkey'])    ? Strings::escapeTags(trim($_POST['consumerkey']))    : '';
-	$consumersecret = !empty($_POST['consumersecret']) ? Strings::escapeTags(trim($_POST['consumersecret'])) : '';
+	$consumerkey    = !empty($_POST['consumerkey'])    ? trim($_POST['consumerkey'])    : '';
+	$consumersecret = !empty($_POST['consumersecret']) ? trim($_POST['consumersecret']) : '';
 	DI::config()->set('twitter', 'consumerkey', $consumerkey);
 	DI::config()->set('twitter', 'consumersecret', $consumersecret);
 }
diff --git a/webrtc/webrtc.php b/webrtc/webrtc.php
index 0dcc7c19..b3c7ced8 100644
--- a/webrtc/webrtc.php
+++ b/webrtc/webrtc.php
@@ -9,7 +9,6 @@
 use Friendica\Core\Hook;
 use Friendica\Core\Renderer;
 use Friendica\DI;
-use Friendica\Util\Strings;
 
 function webrtc_install() {
         Hook::register('app_menu', 'addon/webrtc/webrtc.php', 'webrtc_app_menu');
@@ -27,7 +26,7 @@ function webrtc_addon_admin (&$a, &$o) {
 	]);
 }
 function webrtc_addon_admin_post (&$a) {
-        $url = (!empty($_POST['webrtcurl']) ? Strings::escapeTags(trim($_POST['webrtcurl'])) : '');
+        $url = (!empty($_POST['webrtcurl']) ? trim($_POST['webrtcurl']) : '');
 	    DI::config()->set('webrtc', 'webrtcurl', $url);
 }