Provide references for CVE-2021-23420.
Where can I find more information about CVE-2021-23420?
References are available at: https://github.com/JinYiTong/poc, https://snyk.io/vuln/SNYK-PHP-CODECEPTIONCODECEPTION-1324585, https://github.com/Codeception/Codeception/blob/4.1/ext/RunProcess.php%23L52, https://github.com/Codeception/Codeception/pull/6241.