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<title>[55358] trunk: Login and Registration: prevent registering with username that matches previous user email.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/55358">55358</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/55358","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>adamsilverstein</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2023-02-17 08:08:19 +0000 (Fri, 17 Feb 2023)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Login and Registration: prevent registering with username that matches previous user email.
When registering a new user, check that no existing user has an email matching the username.
Prevents a login name collision when one user registers with the email address user@test.com and a second user tries to register with the username user@test.com.
Props buutqn, dunhakdis, roytanck, ajayver.
Fixes <a href="https://core.trac.wordpress.org/ticket/57394">#57394</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesuserphp">trunk/src/wp-includes/user.php</a></li>
<li><a href="#trunktestsphpunittestsuserphp">trunk/tests/phpunit/tests/user.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludesuserphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/user.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/user.php 2023-02-17 07:51:16 UTC (rev 55357)
+++ trunk/src/wp-includes/user.php 2023-02-17 08:08:19 UTC (rev 55358)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2123,10 +2123,16 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return new WP_Error( 'user_login_too_long', __( 'Username may not be longer than 60 characters.' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Username must be unique.
</ins><span class="cx" style="display: block; padding: 0 10px"> if ( ! $update && username_exists( $user_login ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> return new WP_Error( 'existing_user_login', __( 'Sorry, that username already exists!' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Username must not match an existing user email.
+ if ( email_exists( $user_login ) ) {
+ return new WP_Error( 'existing_user_login_as_email', __( 'Sorry, that username is not available.' ) );
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Filters the list of disallowed usernames.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3340,7 +3346,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $sanitized_user_login = '';
</span><span class="cx" style="display: block; padding: 0 10px"> } elseif ( username_exists( $sanitized_user_login ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $errors->add( 'username_exists', __( '<strong>Error:</strong> This username is already registered. Please choose another one.' ) );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ } elseif ( email_exists( $sanitized_user_login ) ) {
+ $errors->add( 'username_exists_as_email', __( '<strong>Error:</strong> This username is not available. Please choose another one.' ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><span class="cx" style="display: block; padding: 0 10px"> /** This filter is documented in wp-includes/user.php */
</span><span class="cx" style="display: block; padding: 0 10px"> $illegal_user_logins = (array) apply_filters( 'illegal_user_logins', array() );
</span></span></pre></div>
<a id="trunktestsphpunittestsuserphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/user.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/user.php 2023-02-17 07:51:16 UTC (rev 55357)
+++ trunk/tests/phpunit/tests/user.php 2023-02-17 08:08:19 UTC (rev 55358)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -935,6 +935,24 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @ticket 57394
+ */
+ public function test_wp_insert_user_should_reject_username_that_matches_existing_user_email() {
+ $existing_email = get_option( 'admin_email' );
+ $username = wp_insert_user(
+ array(
+ 'user_login' => $existing_email,
+ 'user_email' => 'whatever@example.com',
+ 'user_pass' => 'whatever',
+ 'user_nicename' => 'whatever',
+ )
+ );
+
+ $this->assertWPError( $username );
+ $this->assertSame( 'existing_user_login_as_email', $username->get_error_code() );
+ }
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * @ticket 33793
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> public function test_wp_insert_user_should_not_truncate_to_a_duplicate_user_nicename() {
</span></span></pre>
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