Pedro Lineu Orso chetcpasswd 2.4.1 and earlier verifies and updates user accounts via custom code that processes /etc/shadow and does not follow the PAM configuration, which might allow remote attackers to bypass intended restrictions implemented through PAM.

Pedro Lineu Orso chetcpasswd before 2.3.1 does not document the need for 0400 permissions on /etc/chetcpasswd.allow, which might allow local users to gain sensitive information by reading this file.