Provide references for CVE-2021-28941.
Where can I find more information about CVE-2021-28941?
References are available at: https://pastebin.com/kpzHKKJu, https://github.com/kellan/magpierss/blob/04d2a88b97fdba5813d01dc0d56c772d97360bb5/extlib/Snoopy.class.inc#L660.