Provide references for CVE-2020-13756.
Where can I find more information about CVE-2020-13756?
References are available at: https://github.com/sabberworm/PHP-CSS-Parser/commit/2ebf59e8bfbf6cfc1653a5f0ed743b95062c62a4, https://github.com/sabberworm/PHP-CSS-Parser/releases/tag/8.3.1, http://seclists.org/fulldisclosure/2020/Jun/7, http://packetstormsecurity.com/files/157923/Sabberworm-PHP-CSS-Code-Injection.html.