SQL injection
In April 2015, TeaMp0isoN identified and disclosed vulnerabilities in many major universities including Harvard University, Stanford University, Princeton University, the University of Texas, and the University of California, among others. The majority of the vulnerabilities found were via SQL injection flaws. Also at this time, TeaMp0isoN identified a zero-day SQL Injection vulnerability, resulting in many sites being compromised, including Crime Stoppers in Waterloo, Ontario, Peel and other Canadian cities and districts.