CSRF protection for subscription/unsubscription

darcs-hash:20080829051104-84dde-9bd23c28c2c8a720046060a33ff3e5f246c47116.gz

1 files changed, 9 insertions, 0 deletions

diff --git a/actions/subscribe.php b/actions/subscribe.php
index 71452e46c..8bb723799 100644
--- a/actions/subscribe.php
+++ b/actions/subscribe.php
@@ -36,6 +36,15 @@ class SubscribeAction extends Action {
 			return;
 		}
 
+		# CSRF protection
+
+		$token = $this->trimmed('token');
+		
+		if (!$token || $token != common_session_token()) {
+			common_redirect(common_local_url('subscriptions', array('nickname' => $user->nickname)));
+			return;
+		}
+
 		$other_nickname = $this->arg('subscribeto');
 
 		$result=subs_subscribe_user($user, $other_nickname);