system/libraries/Email.php in CodeIgniter before 3.1.3 allows remote attackers to execute arbitrary code by leveraging control over the email->from field to insert sendmail command-line arguments.
- https://gist.github.com/Zenexer/40d02da5e07f151adeaeeaa11af9ab36
- https://github.com/bcit-ci/CodeIgniter/issues/4963
- https://github.com/ARPSyndicate/cvemon