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The intrusion occurred on December 22 , 2016 , the hacker revealed to have exploited a zero - day vulnerability in the Plone Content Management System Going back to 22nd December 2016 , I tweeted about a 0day vulnerability in Plone CMS which is considered as the most secure CMS till date .
 a zero - day vulnerability: vulnerability; Plone Content Management System: vulnerable system
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:
 a zero - day vulnerability: vulnerability; Plone Content Management System: vulnerable system