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Even apps that have been removed from devices and the app stores still pose an exposure risk due to the sensitive data that remains stored on unsecured servers .
 ( data breach: exposure,  the app stores: victim, sensitive data: compromised data, unsecured servers: victim) 
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: exposure,  the app stores: victim, sensitive data: compromised data, unsecured servers: victim) 