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Four of the five are authentication - related flaws , the most serious of which involved passwords either stored in clear text or reachable by accessing a particular URL .
 discover vulnerability: are authentication - related
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: are authentication - related