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Earlier this week , the hacker , known only as Cipher0007 , disclosed the existence of two " high - risk " bugs through Reddit .
 ( discover vulnerability: disclosed,  the existence of two " high - risk " bugs: vulnerability, Cipher0007: discoverer, the hacker: discoverer, Earlier this week: time) 
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:
 ( discover vulnerability: disclosed,  the existence of two " high - risk " bugs: vulnerability, Cipher0007: discoverer, the hacker: discoverer, Earlier this week: time) 