Resolve BIEST 5764

Closes #5764

Merge request studip/studip!4404

2 files changed, 8 insertions, 0 deletions

diff --git a/lib/functions.php b/lib/functions.php
index f08ab88..a6bad21 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -1188,6 +1188,10 @@ function get_title_for_status($type, $count, $sem_type = NULL)
  */
 function is_internal_url($url)
 {
+    if (mb_substr($url, 0, 2) === '//') {
+        $url = Request::protocol() . ':' . $url;
+    }
+
     if (preg_match('%^[a-z]+:%', $url)) {
         return mb_strpos($url, $GLOBALS['ABSOLUTE_URI_STUDIP']) === 0;
     }
diff --git a/lib/visual.inc.php b/lib/visual.inc.php
index f070752..4b3f321 100644
--- a/lib/visual.inc.php
+++ b/lib/visual.inc.php
@@ -283,6 +283,10 @@ function isURL($url) {
 }
 
 function isLinkIntern($url) {
+    if (mb_substr($url, 0, 2) === '//') {
+        $url = Request::protocol() . ':' . $url;
+    }
+
     $pum = @parse_url(TransformInternalLinks($url));
 
     if (!$pum) {