mysqld in MySQL 4.1.x before 4.1.18, 5.0.x before 5.0.19, and 5.1.x before 5.1.6 allows remote authorized users to cause a denial of service (crash) via a NULL second argument to the str_to_date function.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.081
EPSS Ranking 91.8%