3213
Approximately 560,000 people were affected by a flaw in the script used to migrate followers to the new archival handles .
 ( discover vulnerability: affected by,  a flaw: vulnerability, the script: vulnerable system, migrate followers to the new archival handles: 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: affected by,  a flaw: vulnerability, the script: vulnerable system, migrate followers to the new archival handles: capabilities) 