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WIP: Trac-27994: Bypass plugin file exists check when user visits plugin.php #8760

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WIP: Trac-27994: Bypass plugin file exists check when user visits plugin.php #8760

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769a30c
Bypass plugin file exists check when user visits plugin.php
Apr 30, 2025
ab44b58
Merge branch 'trunk' into feature/ticket-27994
vishalkakadiya Feb 9, 2026
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23 changes: 14 additions & 9 deletions src/wp-admin/includes/plugin.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1087,7 +1087,7 @@ function validate_active_plugins() {

// Invalid plugins get deactivated.
foreach ( $plugins as $plugin ) {
$result = validate_plugin( $plugin );
$result = validate_plugin( $plugin, true );
if ( is_wp_error( $result ) ) {
$invalid[ $plugin ] = $result;
deactivate_plugins( $plugin, true );
Expand All @@ -1103,20 +1103,25 @@ function validate_active_plugins() {
*
* @since 2.5.0
*
* @param string $plugin Path to the plugin file relative to the plugins directory.
* @param string $plugin Path to the plugin file relative to the plugins' directory.
* @param bool $need_check_exists Whether to bypass the plugin file exists check, default is false which will check file exists.
* @return int|WP_Error 0 on success, WP_Error on failure.
*/
function validate_plugin( $plugin ) {
function validate_plugin( $plugin, $need_check_exists = false ) {
if ( validate_file( $plugin ) ) {
return new WP_Error( 'plugin_invalid', __( 'Invalid plugin path.' ) );
}
if ( ! file_exists( WP_PLUGIN_DIR . '/' . $plugin ) ) {
return new WP_Error( 'plugin_not_found', __( 'Plugin file does not exist.' ) );
}

$installed_plugins = get_plugins();
if ( ! isset( $installed_plugins[ $plugin ] ) ) {
return new WP_Error( 'no_plugin_header', __( 'The plugin does not have a valid header.' ) );
if ( ! $need_check_exists ) {

if ( ! file_exists( WP_PLUGIN_DIR . '/' . $plugin ) ) {
return new WP_Error( 'plugin_not_found', __( 'Plugin file does not exist.' ) );
}

$installed_plugins = get_plugins();
if ( ! isset( $installed_plugins[ $plugin ] ) ) {
return new WP_Error( 'no_plugin_header', __( 'The plugin does not have a valid header.' ) );
}
}
return 0;
}
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