diff --git a/wp-includes/js/tinymce/plugins/wplink/plugin.js b/wp-includes/js/tinymce/plugins/wplink/plugin.js
index c7836b3763..715a0c278a 100644
--- a/wp-includes/js/tinymce/plugins/wplink/plugin.js
+++ b/wp-includes/js/tinymce/plugins/wplink/plugin.js
@@ -440,10 +440,26 @@
 							$input.autocomplete( 'search' );
 						}
 					} )
+					// Returns a jQuery object containing the menu element.
 					.autocomplete( 'widget' )
 						.addClass( 'wplink-autocomplete' )
 						.attr( 'role', 'listbox' )
-						.removeAttr( 'tabindex' ); // Remove the `tabindex=0` attribute added by jQuery UI.
+						.removeAttr( 'tabindex' ) // Remove the `tabindex=0` attribute added by jQuery UI.
+						/*
+						 * Looks like Safari and VoiceOver need an `aria-selected` attribute. See ticket #33301.
+						 * The `menufocus` and `menublur` events are the same events used to add and remove
+						 * the `ui-state-focus` CSS class on the menu items. See jQuery UI Menu Widget.
+						 */
+						.on( 'menufocus', function( event, ui ) {
+							ui.item.attr( 'aria-selected', 'true' );
+						})
+						.on( 'menublur', function() {
+							/*
+							 * The `menublur` event returns an object where the item is `null`
+							 * so we need to find the active item with other means.
+							 */
+							$( this ).find( '[aria-selected="true"]' ).removeAttr( 'aria-selected' );
+						});
 				}
 
 				tinymce.$( input ).on( 'keydown', function( event ) {
diff --git a/wp-includes/js/tinymce/plugins/wplink/plugin.min.js b/wp-includes/js/tinymce/plugins/wplink/plugin.min.js
index 4af18a8442..95b6b98ee1 100644
--- a/wp-includes/js/tinymce/plugins/wplink/plugin.min.js
+++ b/wp-includes/js/tinymce/plugins/wplink/plugin.min.js
@@ -1 +1 @@
-!function(a){a.ui.WPLinkPreview=a.ui.Control.extend({url:"#",renderHtml:function(){return'<div id="'+this._id+'" class="wp-link-preview"><a href="'+this.url+'" target="_blank" tabindex="-1">'+this.url+"</a></div>"},setURL:function(b){var c,d;this.url!==b&&(this.url=b,b=window.decodeURIComponent(b),b=b.replace(/^(?:https?:)?\/\/(?:www\.)?/,""),-1!==(c=b.indexOf("?"))&&(b=b.slice(0,c)),-1!==(c=b.indexOf("#"))&&(b=b.slice(0,c)),b=b.replace(/(?:index)?\.html$/,""),"/"===b.charAt(b.length-1)&&(b=b.slice(0,-1)),""===b&&(b=this.url),b.length>40&&-1!==(c=b.indexOf("/"))&&-1!==(d=b.lastIndexOf("/"))&&d!==c&&(c+b.length-d<40&&(d=-(40-(c+1))),b=b.slice(0,c+1)+"\u2026"+b.slice(d)),a.$(this.getEl().firstChild).attr("href",this.url).text(b))}}),a.ui.WPLinkInput=a.ui.Control.extend({renderHtml:function(){return'<div id="'+this._id+'" class="wp-link-input"><input type="text" value="" placeholder="'+a.translate("Paste URL or type to search")+'" /><input type="text" style="display:none" value="" /></div>'},setURL:function(a){this.getEl().firstChild.value=a},getURL:function(){return a.trim(this.getEl().firstChild.value)},getLinkText:function(){var b=this.getEl().firstChild.nextSibling.value;return a.trim(b)?b.replace(/[\r\n\t ]+/g," "):""},reset:function(){var a=this.getEl().firstChild;a.value="",a.nextSibling.value=""}}),a.PluginManager.add("wplink",function(b){function c(){var a,c,d=b.selection.getNode(),e=b.dom.getParent(d,"a[href]");return e||(c=b.selection.getContent({format:"raw"}),c&&-1!==c.indexOf("</a>")&&(a=c.match(/href="([^">]+)"/),a&&a[1]&&(e=b.$('a[href="'+a[1]+'"]',d)[0]),e&&b.selection.select(e))),e}function d(){b.$("a").each(function(a,c){var d=b.$(c);"_wp_link_placeholder"===d.attr("href")?b.dom.remove(c,!0):d.attr("data-wplink-edit")&&d.attr("data-wplink-edit",null)})}function e(a,b){return b&&(a=a.replace(/ data-wplink-edit="true"/g,"")),a.replace(/<a [^>]*?href="_wp_link_placeholder"[^>]*>([\s\S]+)<\/a>/g,"$1")}var f,g,h,i,j,k,l,m=window.jQuery;return b.on("preinit",function(){if(b.wp&&b.wp._createToolbar){f=b.wp._createToolbar(["wp_link_preview","wp_link_edit","wp_link_remove"],!0);var c=["wp_link_input","wp_link_apply"];"undefined"!=typeof window.wpLink&&c.push("wp_link_advanced"),g=b.wp._createToolbar(c,!0),g.on("show",function(){a.$(document.body).hasClass("modal-open")||window.setTimeout(function(){var a=g.$el.find("input.ui-autocomplete-input")[0],b=j&&(j.textContent||j.innerText);a&&(!a.value&&b&&"undefined"!=typeof window.wpLink&&(a.value=window.wpLink.getUrlFromSelection(b)),k||(a.focus(),a.select()))})}),g.on("hide",function(){g.scrolling||b.execCommand("wp_link_cancel")})}}),b.addCommand("WP_Link",function(){return a.Env.ie&&a.Env.ie<10&&"undefined"!=typeof window.wpLink?void window.wpLink.open(b.id):(j=c(),g.tempHide=!1,void(j?b.dom.setAttribs(j,{"data-wplink-edit":!0}):(d(),b.execCommand("mceInsertLink",!1,{href:"_wp_link_placeholder"}),j=b.$('a[href="_wp_link_placeholder"]')[0],b.nodeChanged())))}),b.addCommand("wp_link_apply",function(){if(!g.scrolling){var c,d;if(j){if(c=i.getURL(),d=i.getLinkText(),b.focus(),!c)return void b.dom.remove(j,!0);/^(?:[a-z]+:|#|\?|\.|\/)/.test(c)||(c="http://"+c),b.dom.setAttribs(j,{href:c,"data-wplink-edit":null}),a.trim(j.innerHTML)||b.$(j).text(d||c)}i.reset(),b.nodeChanged(),"undefined"!=typeof window.wp&&window.wp.a11y&&"undefined"!=typeof window.wpLinkL10n&&window.wp.a11y.speak(window.wpLinkL10n.linkInserted)}}),b.addCommand("wp_link_cancel",function(){g.tempHide||(i.reset(),d(),b.focus(),g.tempHide=!1)}),b.addShortcut("access+a","","WP_Link"),b.addShortcut("meta+k","","WP_Link"),b.addButton("link",{icon:"link",tooltip:"Insert/edit link",cmd:"WP_Link",stateSelector:"a[href]"}),b.addButton("unlink",{icon:"unlink",tooltip:"Remove link",cmd:"unlink"}),b.addMenuItem("link",{icon:"link",text:"Insert/edit link",cmd:"WP_Link",stateSelector:"a[href]",context:"insert",prependToContext:!0}),b.on("pastepreprocess",function(c){var d=c.content,e=/^(?:https?:)?\/\/\S+$/i;b.selection.isCollapsed()||e.test(b.selection.getContent())||(d=d.replace(/<[^>]+>/g,""),d=a.trim(d),e.test(d)&&(b.execCommand("mceInsertLink",!1,{href:b.dom.decode(d)}),c.preventDefault()))}),b.on("savecontent",function(a){a.content=e(a.content,!0)}),b.on("BeforeAddUndo",function(a){a.lastLevel&&a.lastLevel.content&&a.level.content&&a.lastLevel.content===e(a.level.content)&&a.preventDefault()}),b.on("keydown",function(b){b.altKey||a.Env.mac&&(!b.metaKey||b.ctrlKey)||!a.Env.mac&&!b.ctrlKey||(89===b.keyCode||90===b.keyCode)&&(k=!0,window.clearTimeout(l),l=window.setTimeout(function(){k=!1},500))}),b.addButton("wp_link_preview",{type:"WPLinkPreview",onPostRender:function(){h=this}}),b.addButton("wp_link_input",{type:"WPLinkInput",onPostRender:function(){var c,d,e,f=this.getEl(),h=f.firstChild;i=this,m&&m.ui&&m.ui.autocomplete&&(c=m(h),c.on("keydown",function(){c.removeAttr("aria-activedescendant")}).autocomplete({source:function(a,b){return e===a.term?void b(d):/^https?:/.test(a.term)||-1!==a.term.indexOf(".")?b():(m.post(window.ajaxurl,{action:"wp-link-ajax",page:1,search:a.term,_ajax_linking_nonce:m("#_ajax_linking_nonce").val()},function(a){d=a,b(a)},"json"),void(e=a.term))},focus:function(a,b){c.attr("aria-activedescendant","mce-wp-autocomplete-"+b.item.ID),a.preventDefault()},select:function(a,b){return c.val(b.item.permalink),m(f.firstChild.nextSibling).val(b.item.title),9===a.keyCode&&"undefined"!=typeof window.wp&&window.wp.a11y&&"undefined"!=typeof window.wpLinkL10n&&window.wp.a11y.speak(window.wpLinkL10n.linkSelected),!1},open:function(){c.attr("aria-expanded","true"),g.blockHide=!0},close:function(){c.attr("aria-expanded","false"),g.blockHide=!1},minLength:2,position:{my:"left top+2"},messages:{noResults:"undefined"!=typeof window.uiAutocompleteL10n?window.uiAutocompleteL10n.noResults:"",results:function(a){return"undefined"!=typeof window.uiAutocompleteL10n?a>1?window.uiAutocompleteL10n.manyResults.replace("%d",a):window.uiAutocompleteL10n.oneResult:void 0}}}).autocomplete("instance")._renderItem=function(a,b){return m('<li role="option" id="mce-wp-autocomplete-'+b.ID+'">').append("<span>"+b.title+'</span>&nbsp;<span class="wp-editor-float-right">'+b.info+"</span>").appendTo(a)},c.attr({role:"combobox","aria-autocomplete":"list","aria-expanded":"false","aria-owns":c.autocomplete("widget").attr("id")}).on("focus",function(){var a=c.val();a&&!/^https?:/.test(a)&&c.autocomplete("search")}).autocomplete("widget").addClass("wplink-autocomplete").attr("role","listbox").removeAttr("tabindex")),a.$(h).on("keydown",function(a){13===a.keyCode&&(b.execCommand("wp_link_apply"),a.preventDefault())})}}),b.on("wptoolbar",function(c){var d,e,j,k=b.dom.getParent(c.element,"a");return a.$(document.body).hasClass("modal-open")?void(g.tempHide=!0):(g.tempHide=!1,void(k&&(d=b.$(k),e=d.attr("href"),j=d.attr("data-wplink-edit"),"_wp_link_placeholder"===e||j?(j&&!i.getURL()&&i.setURL(e),c.element=k,c.toolbar=g):e&&!d.find("img").length&&(h.setURL(e),c.element=k,c.toolbar=f))))}),b.addButton("wp_link_edit",{tooltip:"Edit ",icon:"dashicon dashicons-edit",cmd:"WP_Link"}),b.addButton("wp_link_remove",{tooltip:"Remove",icon:"dashicon dashicons-no",cmd:"unlink"}),b.addButton("wp_link_advanced",{tooltip:"Link options",icon:"dashicon dashicons-admin-generic",onclick:function(){if("undefined"!=typeof window.wpLink){var c=i.getURL()||null,d=i.getLinkText()||null;a.Env.ie&&b.focus(),window.wpLink.open(b.id,c,d,j),g.tempHide=!0,i.reset()}}}),b.addButton("wp_link_apply",{tooltip:"Apply",icon:"dashicon dashicons-editor-break",cmd:"wp_link_apply",classes:"widget btn primary"}),{close:function(){g.tempHide=!1,b.execCommand("wp_link_cancel")}}})}(window.tinymce);
\ No newline at end of file
+!function(a){a.ui.WPLinkPreview=a.ui.Control.extend({url:"#",renderHtml:function(){return'<div id="'+this._id+'" class="wp-link-preview"><a href="'+this.url+'" target="_blank" tabindex="-1">'+this.url+"</a></div>"},setURL:function(b){var c,d;this.url!==b&&(this.url=b,b=window.decodeURIComponent(b),b=b.replace(/^(?:https?:)?\/\/(?:www\.)?/,""),-1!==(c=b.indexOf("?"))&&(b=b.slice(0,c)),-1!==(c=b.indexOf("#"))&&(b=b.slice(0,c)),b=b.replace(/(?:index)?\.html$/,""),"/"===b.charAt(b.length-1)&&(b=b.slice(0,-1)),""===b&&(b=this.url),b.length>40&&-1!==(c=b.indexOf("/"))&&-1!==(d=b.lastIndexOf("/"))&&d!==c&&(c+b.length-d<40&&(d=-(40-(c+1))),b=b.slice(0,c+1)+"\u2026"+b.slice(d)),a.$(this.getEl().firstChild).attr("href",this.url).text(b))}}),a.ui.WPLinkInput=a.ui.Control.extend({renderHtml:function(){return'<div id="'+this._id+'" class="wp-link-input"><input type="text" value="" placeholder="'+a.translate("Paste URL or type to search")+'" /><input type="text" style="display:none" value="" /></div>'},setURL:function(a){this.getEl().firstChild.value=a},getURL:function(){return a.trim(this.getEl().firstChild.value)},getLinkText:function(){var b=this.getEl().firstChild.nextSibling.value;return a.trim(b)?b.replace(/[\r\n\t ]+/g," "):""},reset:function(){var a=this.getEl().firstChild;a.value="",a.nextSibling.value=""}}),a.PluginManager.add("wplink",function(b){function c(){var a,c,d=b.selection.getNode(),e=b.dom.getParent(d,"a[href]");return e||(c=b.selection.getContent({format:"raw"}),c&&-1!==c.indexOf("</a>")&&(a=c.match(/href="([^">]+)"/),a&&a[1]&&(e=b.$('a[href="'+a[1]+'"]',d)[0]),e&&b.selection.select(e))),e}function d(){b.$("a").each(function(a,c){var d=b.$(c);"_wp_link_placeholder"===d.attr("href")?b.dom.remove(c,!0):d.attr("data-wplink-edit")&&d.attr("data-wplink-edit",null)})}function e(a,b){return b&&(a=a.replace(/ data-wplink-edit="true"/g,"")),a.replace(/<a [^>]*?href="_wp_link_placeholder"[^>]*>([\s\S]+)<\/a>/g,"$1")}var f,g,h,i,j,k,l,m=window.jQuery;return b.on("preinit",function(){if(b.wp&&b.wp._createToolbar){f=b.wp._createToolbar(["wp_link_preview","wp_link_edit","wp_link_remove"],!0);var c=["wp_link_input","wp_link_apply"];"undefined"!=typeof window.wpLink&&c.push("wp_link_advanced"),g=b.wp._createToolbar(c,!0),g.on("show",function(){a.$(document.body).hasClass("modal-open")||window.setTimeout(function(){var a=g.$el.find("input.ui-autocomplete-input")[0],b=j&&(j.textContent||j.innerText);a&&(!a.value&&b&&"undefined"!=typeof window.wpLink&&(a.value=window.wpLink.getUrlFromSelection(b)),k||(a.focus(),a.select()))})}),g.on("hide",function(){g.scrolling||b.execCommand("wp_link_cancel")})}}),b.addCommand("WP_Link",function(){return a.Env.ie&&a.Env.ie<10&&"undefined"!=typeof window.wpLink?void window.wpLink.open(b.id):(j=c(),g.tempHide=!1,void(j?b.dom.setAttribs(j,{"data-wplink-edit":!0}):(d(),b.execCommand("mceInsertLink",!1,{href:"_wp_link_placeholder"}),j=b.$('a[href="_wp_link_placeholder"]')[0],b.nodeChanged())))}),b.addCommand("wp_link_apply",function(){if(!g.scrolling){var c,d;if(j){if(c=i.getURL(),d=i.getLinkText(),b.focus(),!c)return void b.dom.remove(j,!0);/^(?:[a-z]+:|#|\?|\.|\/)/.test(c)||(c="http://"+c),b.dom.setAttribs(j,{href:c,"data-wplink-edit":null}),a.trim(j.innerHTML)||b.$(j).text(d||c)}i.reset(),b.nodeChanged(),"undefined"!=typeof window.wp&&window.wp.a11y&&"undefined"!=typeof window.wpLinkL10n&&window.wp.a11y.speak(window.wpLinkL10n.linkInserted)}}),b.addCommand("wp_link_cancel",function(){g.tempHide||(i.reset(),d(),b.focus(),g.tempHide=!1)}),b.addShortcut("access+a","","WP_Link"),b.addShortcut("meta+k","","WP_Link"),b.addButton("link",{icon:"link",tooltip:"Insert/edit link",cmd:"WP_Link",stateSelector:"a[href]"}),b.addButton("unlink",{icon:"unlink",tooltip:"Remove link",cmd:"unlink"}),b.addMenuItem("link",{icon:"link",text:"Insert/edit link",cmd:"WP_Link",stateSelector:"a[href]",context:"insert",prependToContext:!0}),b.on("pastepreprocess",function(c){var d=c.content,e=/^(?:https?:)?\/\/\S+$/i;b.selection.isCollapsed()||e.test(b.selection.getContent())||(d=d.replace(/<[^>]+>/g,""),d=a.trim(d),e.test(d)&&(b.execCommand("mceInsertLink",!1,{href:b.dom.decode(d)}),c.preventDefault()))}),b.on("savecontent",function(a){a.content=e(a.content,!0)}),b.on("BeforeAddUndo",function(a){a.lastLevel&&a.lastLevel.content&&a.level.content&&a.lastLevel.content===e(a.level.content)&&a.preventDefault()}),b.on("keydown",function(b){b.altKey||a.Env.mac&&(!b.metaKey||b.ctrlKey)||!a.Env.mac&&!b.ctrlKey||(89===b.keyCode||90===b.keyCode)&&(k=!0,window.clearTimeout(l),l=window.setTimeout(function(){k=!1},500))}),b.addButton("wp_link_preview",{type:"WPLinkPreview",onPostRender:function(){h=this}}),b.addButton("wp_link_input",{type:"WPLinkInput",onPostRender:function(){var c,d,e,f=this.getEl(),h=f.firstChild;i=this,m&&m.ui&&m.ui.autocomplete&&(c=m(h),c.on("keydown",function(){c.removeAttr("aria-activedescendant")}).autocomplete({source:function(a,b){return e===a.term?void b(d):/^https?:/.test(a.term)||-1!==a.term.indexOf(".")?b():(m.post(window.ajaxurl,{action:"wp-link-ajax",page:1,search:a.term,_ajax_linking_nonce:m("#_ajax_linking_nonce").val()},function(a){d=a,b(a)},"json"),void(e=a.term))},focus:function(a,b){c.attr("aria-activedescendant","mce-wp-autocomplete-"+b.item.ID),a.preventDefault()},select:function(a,b){return c.val(b.item.permalink),m(f.firstChild.nextSibling).val(b.item.title),9===a.keyCode&&"undefined"!=typeof window.wp&&window.wp.a11y&&"undefined"!=typeof window.wpLinkL10n&&window.wp.a11y.speak(window.wpLinkL10n.linkSelected),!1},open:function(){c.attr("aria-expanded","true"),g.blockHide=!0},close:function(){c.attr("aria-expanded","false"),g.blockHide=!1},minLength:2,position:{my:"left top+2"},messages:{noResults:"undefined"!=typeof window.uiAutocompleteL10n?window.uiAutocompleteL10n.noResults:"",results:function(a){return"undefined"!=typeof window.uiAutocompleteL10n?a>1?window.uiAutocompleteL10n.manyResults.replace("%d",a):window.uiAutocompleteL10n.oneResult:void 0}}}).autocomplete("instance")._renderItem=function(a,b){return m('<li role="option" id="mce-wp-autocomplete-'+b.ID+'">').append("<span>"+b.title+'</span>&nbsp;<span class="wp-editor-float-right">'+b.info+"</span>").appendTo(a)},c.attr({role:"combobox","aria-autocomplete":"list","aria-expanded":"false","aria-owns":c.autocomplete("widget").attr("id")}).on("focus",function(){var a=c.val();a&&!/^https?:/.test(a)&&c.autocomplete("search")}).autocomplete("widget").addClass("wplink-autocomplete").attr("role","listbox").removeAttr("tabindex").on("menufocus",function(a,b){b.item.attr("aria-selected","true")}).on("menublur",function(){m(this).find('[aria-selected="true"]').removeAttr("aria-selected")})),a.$(h).on("keydown",function(a){13===a.keyCode&&(b.execCommand("wp_link_apply"),a.preventDefault())})}}),b.on("wptoolbar",function(c){var d,e,j,k=b.dom.getParent(c.element,"a");return a.$(document.body).hasClass("modal-open")?void(g.tempHide=!0):(g.tempHide=!1,void(k&&(d=b.$(k),e=d.attr("href"),j=d.attr("data-wplink-edit"),"_wp_link_placeholder"===e||j?(j&&!i.getURL()&&i.setURL(e),c.element=k,c.toolbar=g):e&&!d.find("img").length&&(h.setURL(e),c.element=k,c.toolbar=f))))}),b.addButton("wp_link_edit",{tooltip:"Edit ",icon:"dashicon dashicons-edit",cmd:"WP_Link"}),b.addButton("wp_link_remove",{tooltip:"Remove",icon:"dashicon dashicons-no",cmd:"unlink"}),b.addButton("wp_link_advanced",{tooltip:"Link options",icon:"dashicon dashicons-admin-generic",onclick:function(){if("undefined"!=typeof window.wpLink){var c=i.getURL()||null,d=i.getLinkText()||null;a.Env.ie&&b.focus(),window.wpLink.open(b.id,c,d,j),g.tempHide=!0,i.reset()}}}),b.addButton("wp_link_apply",{tooltip:"Apply",icon:"dashicon dashicons-editor-break",cmd:"wp_link_apply",classes:"widget btn primary"}),{close:function(){g.tempHide=!1,b.execCommand("wp_link_cancel")}}})}(window.tinymce);
\ No newline at end of file
diff --git a/wp-includes/js/tinymce/wp-tinymce.js.gz b/wp-includes/js/tinymce/wp-tinymce.js.gz
index 1cdd43362c..8f3802eb29 100644
Binary files a/wp-includes/js/tinymce/wp-tinymce.js.gz and b/wp-includes/js/tinymce/wp-tinymce.js.gz differ
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b7e8eac66a..ad9cf9c6a2 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5.1-alpha-37245';
+$wp_version = '4.5.1-alpha-37246';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.