Недостаточная проверка ввода пользователя.
vulners.com/securityvulns/securityvulns:doc:2421
vulners.com/securityvulns/securityvulns:doc:2422
vulners.com/securityvulns/securityvulns:doc:2425
vulners.com/securityvulns/securityvulns:doc:2426