--- loncom/auth/lonacc.pm	2020/09/30 19:33:59	1.159.2.12
+++ loncom/auth/lonacc.pm	2020/10/01 10:42:56	1.159.2.13
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Cookie Based Access Handler
 #
-# $Id: lonacc.pm,v 1.159.2.12 2020/09/30 19:33:59 raeburn Exp $
+# $Id: lonacc.pm,v 1.159.2.13 2020/10/01 10:42:56 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -617,6 +617,9 @@ sub handler {
                     my $query = $r->args;
                     foreach my $pair (split(/&/,$query)) {
                         my ($name, $value) = split(/=/,$pair);
+                        $name = &unescape($name);
+                        $value =~ tr/+/ /;
+                        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                         if ($name eq 'symb') {
                             $poss_symb = &Apache::lonnet::symbclean($value);
                             last;