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Within a couple of hours of the release of the update , WordPress users who have opted for the automatic WP update option had the WP 4.7.2 installed and were protected .
 patch vulnerability: the release of the update
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:
 patch vulnerability: the release of the update