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The stealer essentially performed a man - in - the - middle attack between the user and the checkout page after credit card information was entered .
 ( data breach: essentially performed,  The stealer: attacker, a man - in - the - middle attack: attack pattern, the user: victim, the checkout page: victim, credit card information: compromised data) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( data breach: essentially performed,  The stealer: attacker, a man - in - the - middle attack: attack pattern, the user: victim, the checkout page: victim, credit card information: compromised data) 