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On immediate investigation , we identified that although ABTA ’s own IT systems remained secure , there was a vulnerability to the web server for abta.com , which is managed for ABTA through a third - party web developer and hosting company .
 ( discover vulnerability: identified,  we: vulnerable system owner, a vulnerability: vulnerability, the web server: vulnerable system, abta.com: vulnerable system) 
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: identified,  we: vulnerable system owner, a vulnerability: vulnerability, the web server: vulnerable system, abta.com: vulnerable system) 