diff --git a/wp-admin/edit-category-form.php b/wp-admin/edit-category-form.php
index aaf1c1353e..672a14a3ac 100644
--- a/wp-admin/edit-category-form.php
+++ b/wp-admin/edit-category-form.php
@@ -26,7 +26,7 @@ if ( ! empty($cat_ID) ) {
 	<table class="form-table">
 		<tr class="form-field form-required">
 			<th scope="row" valign="top"><label for="cat_name"><?php _e('Category Name') ?></label></th>
-			<td><input name="cat_name" id="cat_name" type="text" value="<?php echo attribute_escape($category->name); ?>" size="40" /><br />
+			<td><input name="cat_name" id="cat_name" type="text" value="<?php echo attribute_escape($category->name); ?>" size="40" aria-required="true" /><br />
             <?php _e('The name is used to identify the category almost everywhere, for example under the post or in the category widget.'); ?></td>
 		</tr>
 		<tr class="form-field">
diff --git a/wp-admin/edit-form-advanced.php b/wp-admin/edit-form-advanced.php
index c26a4fd476..89e84877e7 100644
--- a/wp-admin/edit-form-advanced.php
+++ b/wp-admin/edit-form-advanced.php
@@ -222,7 +222,7 @@ endif; ?>
 <div id="category-adder" class="wp-hidden-children">
 	<h4><a id="category-add-toggle" href="#category-add" class="hide-if-no-js" tabindex="3"><?php _e( '+ Add New Category' ); ?></a></h4>
 	<p id="category-add" class="wp-hidden-child">
-		<label class="hidden" for="newcat"><?php _e( 'Add New Category' ); ?></label><input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _e( 'New category name' ); ?>" tabindex="3" />
+		<label class="hidden" for="newcat"><?php _e( 'Add New Category' ); ?></label><input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _e( 'New category name' ); ?>" tabindex="3" aria-required="true"/>
 		<label class="hidden" for="newcat_parent"><?php _e('Parent category'); ?>:</label><?php wp_dropdown_categories( array( 'hide_empty' => 0, 'name' => 'newcat_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => __('Parent category'), 'tab_index' => 3 ) ); ?>
 		<input type="button" id="category-add-sumbit" class="add:categorychecklist:category-add button" value="<?php _e( 'Add' ); ?>" tabindex="3" />
 		<?php wp_nonce_field( 'add-category', '_ajax_nonce', false ); ?>
diff --git a/wp-admin/edit-link-category-form.php b/wp-admin/edit-link-category-form.php
index ac664300c0..4799e79326 100644
--- a/wp-admin/edit-link-category-form.php
+++ b/wp-admin/edit-link-category-form.php
@@ -26,7 +26,7 @@ if ( ! empty($cat_ID) ) {
 	<table class="form-table">
 		<tr class="form-field form-required">
 			<th scope="row" valign="top"><label for="name"><?php _e('Category name') ?></label></th>
-			<td><input name="name" id="name" type="text" value="<?php echo $category->name; ?>" size="40" /></td>
+			<td><input name="name" id="name" type="text" value="<?php echo $category->name; ?>" size="40" aria-required="true" /></td>
 		</tr>
 		<tr class="form-field">
 			<th scope="row" valign="top"><label for="slug"><?php _e('Category slug') ?></label></th>
diff --git a/wp-admin/edit-link-form.php b/wp-admin/edit-link-form.php
index 7604d3e852..7a823e3172 100644
--- a/wp-admin/edit-link-form.php
+++ b/wp-admin/edit-link-form.php
@@ -105,7 +105,7 @@ if ( ( 'edit' == $action) && current_user_can('manage_links') )
 	<h4><a id="category-add-toggle" href="#category-add"><?php _e( '+ Add New Category' ); ?></a></h4>
 	<p id="link-category-add" class="wp-hidden-child">
 		<label class="hidden" for="newcat"><?php _e( '+ Add New Category' ); ?></label>
-		<input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _e( 'New category name' ); ?>" />
+		<input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php _e( 'New category name' ); ?>" aria-required="true" />
 		<input type="button" id="category-add-sumbit" class="add:categorychecklist:linkcategorydiv button" value="<?php _e( 'Add' ); ?>" />
 		<?php wp_nonce_field( 'add-link-category', '_ajax_nonce', false ); ?>
 		<span id="category-ajax-response"></span>
diff --git a/wp-admin/edit-tag-form.php b/wp-admin/edit-tag-form.php
index 063c4560a5..9e56886ac5 100644
--- a/wp-admin/edit-tag-form.php
+++ b/wp-admin/edit-tag-form.php
@@ -26,7 +26,7 @@ if ( ! empty($tag_ID) ) {
 	<table class="form-table">
 		<tr class="form-field form-required">
 			<th scope="row" valign="top"><label for="name"><?php _e('Tag name') ?></label></th>
-			<td><input name="name" id="name" type="text" value="<?php echo attribute_escape($tag->name); ?>" size="40" />
+			<td><input name="name" id="name" type="text" value="<?php echo attribute_escape($tag->name); ?>" size="40" aria-required="true" />
             <p><?php _e('The name is how the tag appears on your site.'); ?></p></td>
 		</tr>
 		<tr class="form-field">
diff --git a/wp-admin/includes/media.php b/wp-admin/includes/media.php
index a5f96706a3..80c3bd24b7 100644
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -703,6 +703,7 @@ function get_media_item( $attachment_id, $args = null ) {
 		}
 
 		$required = $field['required'] ? '<abbr title="required" class="required">*</abbr>' : '';
+		$aria_required = $field['required'] ? " aria-required='true' " : '';
 		$class  = $id;
 		$class .= $field['required'] ? ' form-required' : '';
 
@@ -710,9 +711,9 @@ function get_media_item( $attachment_id, $args = null ) {
 		if ( !empty($field[$field['input']]) )
 			$item .= $field[$field['input']];
 		elseif ( $field['input'] == 'textarea' ) {
-			$item .= "<textarea type='text' id='$name' name='$name'>" . attribute_escape( $field['value'] ) . "</textarea>";
+			$item .= "<textarea type='text' id='$name' name='$name'>" . attribute_escape( $field['value'] ) . $aria_required . "</textarea>";
 		} else {
-			$item .= "<input type='text' id='$name' name='$name' value='" . attribute_escape( $field['value'] ) . "' />";
+			$item .= "<input type='text' id='$name' name='$name' value='" . attribute_escape( $field['value'] ) . "'" . $aria_required . "/>";
 		}
 		if ( !empty($field['helps']) )
 			$item .= "<p class='help'>" . join( "</p>\n<p class='help'>", array_unique((array) $field['helps']) ) . '</p>';
@@ -1085,14 +1086,14 @@ function type_form_image() {
 				<span class="alignleft"><label for="insertonly[src]">' . __('Image URL') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[src]" name="insertonly[src]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[src]" name="insertonly[src]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr>
 			<th valign="top" scope="row" class="label">
 				<span class="alignleft"><label for="insertonly[alt]">' . __('Description') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[alt]" name="insertonly[alt]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[alt]" name="insertonly[alt]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr><td></td><td class="help">' . __('Alternate text, e.g. "The Mona Lisa"') . '</td></tr>
 		<tr class="align">
@@ -1126,14 +1127,14 @@ function type_form_audio() {
 				<span class="alignleft"><label for="insertonly[href]">' . __('Audio File URL') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[href]" name="insertonly[href]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[href]" name="insertonly[href]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr>
 			<th valign="top" scope="row" class="label">
 				<span class="alignleft"><label for="insertonly[title]">' . __('Title') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[title]" name="insertonly[title]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[title]" name="insertonly[title]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr><td></td><td class="help">' . __('Link text, e.g. "Still Alive by Jonathan Coulton"') . '</td></tr>
 		<tr>
@@ -1154,14 +1155,14 @@ function type_form_video() {
 				<span class="alignleft"><label for="insertonly[href]">' . __('Video URL') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[href]" name="insertonly[href]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[href]" name="insertonly[href]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr>
 			<th valign="top" scope="row" class="label">
 				<span class="alignleft"><label for="insertonly[title]">' . __('Title') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[title]" name="insertonly[title]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[title]" name="insertonly[title]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr><td></td><td class="help">' . __('Link text, e.g. "Lucy on YouTube"') . '</td></tr>
 		<tr>
@@ -1182,14 +1183,14 @@ function type_form_file() {
 				<span class="alignleft"><label for="insertonly[href]">' . __('URL') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[href]" name="insertonly[href]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[href]" name="insertonly[href]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr>
 			<th valign="top" scope="row" class="label">
 				<span class="alignleft"><label for="insertonly[title]">' . __('Title') . '</label></span>
 				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
 			</th>
-			<td class="field"><input id="insertonly[title]" name="insertonly[title]" value="" type="text"></td>
+			<td class="field"><input id="insertonly[title]" name="insertonly[title]" value="" type="text" aria-required="true"></td>
 		</tr>
 		<tr><td></td><td class="help">' . __('Link text, e.g. "Ransom Demands (PDF)"') . '</td></tr>
 		<tr>
diff --git a/wp-admin/users.php b/wp-admin/users.php
index 3b881cc88f..9dd2918971 100644
--- a/wp-admin/users.php
+++ b/wp-admin/users.php
@@ -405,7 +405,7 @@ foreach ( $wp_user_search->get_results() as $userid ) {
 <table class="form-table">
 	<tr class="form-field form-required">
 		<th scope="row"><label for="user_login"><?php _e('Username (required)') ?></label><input name="action" type="hidden" id="action" value="adduser" /></th>
-		<td ><input name="user_login" type="text" id="user_login" value="<?php echo $new_user_login; ?>" /></td>
+		<td ><input name="user_login" type="text" id="user_login" value="<?php echo $new_user_login; ?>" aria-required="true" /></td>
 	</tr>
 	<tr class="form-field">
 		<th scope="row"><label for="first_name"><?php _e('First Name') ?> </label></th>
diff --git a/wp-content/themes/default/comments.php b/wp-content/themes/default/comments.php
index 08b1be1e32..ec2f6c4f5c 100644
--- a/wp-content/themes/default/comments.php
+++ b/wp-content/themes/default/comments.php
@@ -78,10 +78,10 @@
 
 <?php else : ?>
 
-<p><input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="22" tabindex="1" />
+<p><input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="22" tabindex="1" <?php if ($req) echo "aria-required='true'"; ?> />
 <label for="author"><small>Name <?php if ($req) echo "(required)"; ?></small></label></p>
 
-<p><input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="22" tabindex="2" />
+<p><input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="22" tabindex="2" <?php if ($req) echo "aria-required='true'"; ?> />
 <label for="email"><small>Mail (will not be published) <?php if ($req) echo "(required)"; ?></small></label></p>
 
 <p><input type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="22" tabindex="3" />