Nette versions before 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6 are vulnerable to an code injection attack by passing specially formed parameters to URL that may possibly leading to RCE. Nette is a PHP/Composer MVC Framework.
https://isc.sans.edu/diary/rss/31076
https://packagist.org/packages/nette/nette
https://packagist.org/packages/nette/application
https://lists.debian.org/debian-lts-announce/2021/04/msg00003.html
https://github.com/nette/application/security/advisories/GHSA-8gv3-3j7f-wg94