Known vulnerabilities in Simple User Registration 6.7

6.7 6.6 6.4 6.3 6.2 6.1 6.0 5.6 5.5 5.4 5.3 5.1 5.0 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4.0 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0