2443
The same would have been true for a malicious attacker , who had somehow known about the bug and exploited it before Cloudflare ’s fix , he said .
 ( discover vulnerability: known about,  the bug: vulnerability, a malicious attacker: discoverer) 
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: known about,  the bug: vulnerability, a malicious attacker: discoverer) 