Ticket #56329: 56329.patch

src/wp-admin/includes/plugin-install.php

@@ -342 +342 @@
         ?>
 <div class="upload-plugin">
         <p class="install-help"><?php _e( 'If you have a plugin in a .zip format, you may install or update it by uploading it here.' ); ?></p>
-        <form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo self_admin_url( 'update.php?action=upload-plugin' ); ?>">
+        <form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo esc_url( self_admin_url( 'update.php?action=upload-plugin' ) ); ?>">
                 <?php wp_nonce_field( 'plugin-upload' ); ?>
                 <label class="screen-reader-text" for="pluginzip"><?php _e( 'Plugin zip file' ); ?></label>
                 <input type="file" id="pluginzip" name="pluginzip" accept=".zip" />

src/wp-admin/includes/theme-install.php

@@ -182 +182 @@
 function install_themes_upload() {
         ?>
 <p class="install-help"><?php _e( 'If you have a theme in a .zip format, you may install or update it by uploading it here.' ); ?></p>
-<form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo self_admin_url( 'update.php?action=upload-theme' ); ?>">
+<form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo esc_url( self_admin_url( 'update.php?action=upload-theme' ) ); ?>">
         <?php wp_nonce_field( 'theme-upload' ); ?>
         <label class="screen-reader-text" for="themezip"><?php _e( 'Theme zip file' ); ?></label>
         <input type="file" id="themezip" name="themezip" accept=".zip" />