Correctly quote group filter

1 files changed, 1 insertions, 1 deletions

diff --git a/program/include/rcube_ldap.php b/program/include/rcube_ldap.php
index 26d58f468..c363dc572 100644
--- a/program/include/rcube_ldap.php
+++ b/program/include/rcube_ldap.php
@@ -1314,7 +1314,7 @@ class rcube_ldap extends rcube_addressbook
 
         $base_dn = $this->groups_base_dn;
         $contact_dn = base64_decode($contact_id);
-        $filter = "(member=$contact_dn)";
+        $filter = strtr("(member=$contact_dn)", array('\\' => '\\\\'));
 
         $this->_debug("C: Search [$filter][dn: $base_dn]");