diff --git a/authentic-init.pl b/authentic-init.pl
index 43a325284..768141452 100644
--- a/authentic-init.pl
+++ b/authentic-init.pl
@@ -2105,4 +2105,14 @@ sub embed_product_branding
     print $brand;
 }
 
+sub navigation_link_clean
+{
+    my ($link) = @_;
+    if ($link) {
+        $link =~ s/\?$xnav&/?/g;
+        $link =~ s/[?|&]$xnav//g;
+    }
+    return $link;
+}
+
 1;
diff --git a/authentic.pl b/authentic.pl
index 104dc206f..34a9d6cb7 100644
--- a/authentic.pl
+++ b/authentic.pl
@@ -172,7 +172,7 @@ sub theme_footer
                 $url = "/" . &get_module_name() . "/$url";
             }
             $url = "$theme_webprefix$url" if ($url =~ /^\//);
-            $url = $url . "/"             if ($url =~ /[^\/]$/ && $url !~ /.cgi/ && $url !~ /javascript:history/);
+            $url = $url . "/"             if ($url =~ /[^\/]$/ && $url !~ /.cgi/ && $url !~ /javascript:history/ && $url !~ /[&?]/);
             print
 "&nbsp;<a style='margin-bottom: 15px;' class='btn btn-primary btn-lg page_footer_submit' href=\"$url\"><i class='fa fa-fw fa-arrow-left'>&nbsp;</i> <span>",
               &text('main_return', $_[$i + 1]), "</span></a>\n";
@@ -1353,24 +1353,26 @@ sub theme_get_webprefix
 
 sub theme_redirect
 {
-    if ($ENV{'REQUEST_URI'} =~ /noredirect=1/) {
+    my $request_uri = navigation_link_clean($ENV{'REQUEST_URI'});
+    if ($request_uri =~ /noredirect=1/) {
         head();
         return;
     }
 
     my $origin   = $ENV{'HTTP_ORIGIN'};
-    my $referer  = $ENV{'HTTP_REFERER'};
+    my $referer  = navigation_link_clean($ENV{'HTTP_REFERER'});
     my $prefix   = $theme_webprefix;
     my $noredir  = $gconfig{'webprefixnoredir'};
     my $relredir = $gconfig{'relative_redir'};
-    my ($arg1, $arg2) = ($_[0], $_[1]);
+    my ($arg1, $arg2) = (navigation_link_clean($_[0]),
+                         navigation_link_clean($_[1]));
 
     # Clean redirected links query string if requested
-    if ($ENV{'REQUEST_URI'} =~ /no-query=string/) {
+    if ($request_uri =~ /no-query=string/) {
         my $nocache = "no-cache=1";
         $arg1 =~ s/\.cgi.*/.cgi/;
         $arg2 =~ s/\.cgi.*/.cgi/;
-        if ($ENV{'REQUEST_URI'} =~ /\Q$nocache\E/) {
+        if ($request_uri =~ /\Q$nocache\E/) {
             $arg1 .= "?" . $nocache;
             $arg2 .= "?" . $nocache;
         }
diff --git a/unauthenticated/js/bundle.min.js b/unauthenticated/js/bundle.min.js
index 158c9d16e..78baf5d8f 100644
--- a/unauthenticated/js/bundle.min.js
+++ b/unauthenticated/js/bundle.min.js
@@ -90,7 +90,7 @@ if(typeof jQuery==="undefined"){throw new Error("Bootstrap's JavaScript requires
  * Copyright 2012 Chris Wanstrath
  * Licensed under MIT
  */
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s={type:(o.attr("method")||"GET").toUpperCase(),url:o.attr("action"),container:o.attr("data-pjax"),target:i};if(s.type!=="GET"&&window.FormData!==undefined){var l=o.attr("enctype")&&o.attr("enctype").indexOf("form-data")>-1?0:1;s.data=l?o.serialize():new FormData(o[0]);s.processData=false;s.contentType=false}else{if(o.find(":file").length){return}s.data=o.serializeArray()}n(e.extend({},s,a));t.preventDefault()}function n(t){t=e.extend(true,{},e.ajaxSettings,n.defaults,t);if(e.isFunction(t.url)){t.url=t.url()}var r=m(t.url).hash;var a=e.type(t.container);if(a!=="string"){throw"expected string value for 'container' option; got "+a}var i=t.context=e(t.container);if(!i.length){throw"the container selector '"+t.container+"' did not match anything"}if(!t.data)t.data={};function s(r,a,n){if(!n)n={};n.relatedTarget=t.target;var o=e.Event(r,n);i.trigger(o,a);return!o.isDefaultPrevented()}var l;t.beforeSend=function(a,n){if(n.type!=="GET"){n.timeout=0}var i=plugins.pjax.headers.send.get();if(!e.isEmptyObject(i)){for(const e in i){a.setRequestHeader(e+"",i[e])}}a.setRequestHeader("x-pjax","true");a.setRequestHeader("x-pjax-container",t.container);a.setRequestHeader("x-pjax-url",t.url);if(!s("pjax:beforeSend",[a,n]))return false;if(n.timeout>0){l=setTimeout(function(){if(s("pjax:timeout",[a,t]))a.abort("timeout")},n.timeout);n.timeout=0}var o=m(n.url);if(r)o.hash=r;t.requestUrl=v(o)};t.complete=function(e,r){if(l)clearTimeout(l);s("pjax:complete",[e,r,t]);s("pjax:end",[e,t])};t.error=function(e,r,a){var n=y("",e,t);var i=s("pjax:error",[e,r,a,t]);if(t.type=="GET"&&r!=="abort"&&i){o(n.url)}};t.success=function(a,o,l){if(!session.status(a)){return}if(v___theme_reload){return}if(snippets.pjaxHooks(a,"csf")){return}var u=n.state;var c=typeof e.pjax.defaults.version==="function"?e.pjax.defaults.version():e.pjax.defaults.version;var p=l.getResponseHeader("x-pjax-version");var f=y(a,l,t);var h=m(f.url);if(r){h.hash=r;f.url=h.href}if(c&&p&&c!==p){theme_open_new_tab(f.url);page_remove_progress();return}if(!f.contents){var v=XHR.headers(l)[1],g=l.getResponseHeader("Content-Disposition");if(g&&g.toLowerCase()==="attachment"){g=1}else{g=0}if(vars.previous_request&&g){var x=e(vars.previous_request.currentTarget).serialize();window.location.href=vars.previous_request.currentTarget.action+"?"+x;plugins.pjax.page.link.get(location.href);vars.previous_request=String();return}if(!a.includes("data-predownload")&&(Test.strContains(v,"text/html")||Test.strContains(v,"text/plain"))){if(core.curModule("theme")||core.curModule("change-user")||core.curModuleFile("webmin","change_theme.cgi")){window.location.href=location.origin+v___location_prefix}else{theme_open_new_tab(f.url)}}else{theme_open_new_tab(h.href);setTimeout(function(){page_remove_progress()},300)}page_remove_progress();return}n.state={id:t.id||d(),url:f.url,title:f.title,container:t.container,fragment:t.fragment,timeout:t.timeout};if(t.push||t.replace){var 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