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
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: known about