For the second time in 15 months, Stanford University has been hit by an embarrassing data breach that exposed the personal information of students, including home addresses, Social Security numbers and even test scores and essays.

The Stanford Daily is reporting that Stanford students could view applications and high-school transcripts of other students “if they first requested to view their own admission documents under the Family Educational Rights and Privacy Act (FERPA).” Documents that were compromised by the hackers including extremely sensitive personal information like Social Security numbers for some students, as well as “students’ ethnicity, legacy status, home address, citizenship status, criminal status, standardized test scores, personal essays and whether they applied for financial aid.