prevent admin hijacks

mod/notifications.php

@@ -127,7 +127,7 @@ function notifications_content(&$a) {
 		notice( t('No notifications.') . EOL);
 
 	if ($a->config['register_policy'] = REGISTER_APPROVE &&	
-		$a->config['admin_email'] = $a->user['email']){
+		$a->config['admin_email'] === $a->user['email']){
 		$o .= load_view_file('view/registrations-top.tpl');
 		
 		$r = q("SELECT `register`.*, `contact`.`name`, `user`.`email`

mod/regmod.php

@@ -12,6 +12,11 @@ function regmod_content(&$a) {
 		return $o;
 	}
 
+	if((! (x($a->config,'admin_email'))) || ($a->config['admin_email'] !== $a->user['email'])) {
+		notice( t('Permission denied.') . EOL);
+		return '';
+	}
+
 	if($a->argc != 3)
 		killme();
 

mod/settings.php

@@ -95,6 +95,10 @@ function settings_post(&$a) {
 		$email_changed = true;
         if(! valid_email($email))
 			$err .= t(' Not valid email.');
+		if((x($a->config,'admin_email')) && (strcasecmp($email,$a->config['admin_email']) == 0)) {
+			$err .= t(' Cannot change to that email.');
+			$email = $a->user['email'];
+		}
 	}
 
 	if(strlen($err)) {