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While working on something completely unrelated , Google security researcher , Tavis Ormandy , recently discovered that Cloudflare was leaking a wide range of sensitive information , which could have included everything from cookies and tokens , to credentials .
 Tavis Ormandy: discoverer; Google security researcher: discoverer; Cloudflare: vulnerable system owner
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 Tavis Ormandy: discoverer; Google security researcher: discoverer; Cloudflare: vulnerable system owner