3433
A design feature that could potentially allow some encrypted messages to reach unintended recipients is present within the WhatsApp messaging service .
 ( discover vulnerability: is present,  the WhatsApp messaging service: vulnerable system, allow some encrypted messages: capabilities, A design feature: vulnerability) 
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: is present,  the WhatsApp messaging service: vulnerable system, allow some encrypted messages: capabilities, A design feature: vulnerability) 