--- a/program/lib/Roundcube/rcube_vcard.php	Thu Oct 09 11:31:41 2025 -0400
+++ b/program/lib/Roundcube/rcube_vcard.php	Wed Oct 15 14:06:27 2025 -0400
@@ -126,15 +126,20 @@
 
         // find well-known address fields
         $this->displayname  = $this->raw['FN'][0][0];
-        $this->surname      = $this->raw['N'][0][0];
-        $this->firstname    = $this->raw['N'][0][1];
-        $this->middlename   = $this->raw['N'][0][2];
+        if (!empty($this->raw['N'])) {
+	  $this->surname      = $this->raw['N'][0][0];
+	  $this->firstname    = $this->raw['N'][0][1];
+	  $this->middlename   = $this->raw['N'][0][2];
+	}
         $this->nickname     = empty($this->raw['NICKNAME']) ? null : $this->raw['NICKNAME'][0][0];
         $this->organization = empty($this->raw['ORG']) ? null : $this->raw['ORG'][0][0];
-        $this->business     = ($this->raw['X-ABSHOWAS'][0][0] == 'COMPANY') || (join('', (array)$this->raw['N'][0]) == '' && !empty($this->organization));
+       $this->business     = (isset($this->raw['X-ABSHOWAS'][0][0]) && $this->raw['X-ABSHOWAS'][0][0] == 'COMPANY')
+            || (!empty($this->organization) && isset($this->raw['N'][0]) && @implode('', (array) $this->raw['N'][0]) === '');
 
-        foreach ((array)$this->raw['EMAIL'] as $i => $raw_email) {
-            $this->email[$i] = is_array($raw_email) ? $raw_email[0] : $raw_email;
+        if (!empty($this->raw['EMAIL'])) {
+            foreach ((array) $this->raw['EMAIL'] as $i => $raw_email) {
+                $this->email[$i] = is_array($raw_email) ? $raw_email[0] : $raw_email;
+            }
         }
 
         // make the pref e-mail address the first entry in $this->email
@@ -168,11 +173,12 @@
             }
         }
 
-        if ($this->raw['N'][0][3])
+        if (!empty($this->raw['N'])) {
+	  if ($this->raw['N'][0][3])
             $out['prefix'] = $this->raw['N'][0][3];
-        if ($this->raw['N'][0][4])
+	  if ($this->raw['N'][0][4])
             $out['suffix'] = $this->raw['N'][0][4];
-
+	}
         // convert from raw vcard data into associative data for Roundcube
         foreach (array_flip(self::$fieldmap) as $tag => $col) {
 	  if (!empty($this->raw[$tag])) {
@@ -186,21 +192,29 @@
 		  $combined = join(',', self::array_filter((array)$raw['type'], 'internet,pref', true));
 		  $combined = strtoupper($combined);
 
-		  if ($typemap[$combined]) {
+		  if (!empty($typemap[$combined])) {
 		    $subtype = $typemap[$combined];
 		  }
-		  else if ($typemap[$raw['type'][++$k]]) {
+		  else if (!empty($typemap[$raw['type'][++$k]])) {
 		    $subtype = $typemap[$raw['type'][$k]];
 		  }
 		  else {
 		    $subtype = strtolower($raw['type'][$k]);
 		  }
 
-		  while ($k < count($raw['type']) && ($subtype == 'internet' || $subtype == 'pref')) {
-		    $subtype = $typemap[$raw['type'][++$k]] ?: strtolower($raw['type'][$k]);
+                  while ($k < count($raw['type']) && ($subtype == 'interne
+t' || $subtype == 'pref')) {
+		    $k++;
+		    if (!empty($raw['type'][$k])) {
+		      if (!empty($typemap[$raw['type'][$k]])) {
+			$subtype = $typemap[$raw['type'][$k]];
+		      }
+		      else {
+			$subtype = $raw['type'][$k];
+		      }
+		    }
 		  }
 		}
-
 		// read vcard 2.1 subtype
 		if (!$subtype) {
 		  foreach ($raw as $k => $v) {
@@ -241,13 +255,15 @@
 
         // handle special IM fields as used by Apple
         foreach ($this->immap as $tag => $type) {
-            foreach ((array)$this->raw[$tag] as $i => $raw) {
+            if (!empty($this->raw[$tag])) {
+	      foreach ((array)$this->raw[$tag] as $i => $raw) {
                 $out['im:'.$type][] = $raw[0];
-            }
+	      }
+	    }
         }
 
         // copy photo data
-        if ($this->raw['PHOTO']) {
+        if (!empty($this->raw['PHOTO'])) {
             $out['photo'] = $this->raw['PHOTO'][0][0];
         }