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Monday morning was not a great time to be an IT admin , with the public release of a bug that effectively broke WPA2 wireless security .
 ( discover vulnerability: the public release,  a bug: vulnerability, broke WPA2 wireless security: capabilities) 
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: the public release,  a bug: vulnerability, broke WPA2 wireless security: capabilities) 