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Popular open source forum software suffers from vulnerabilities that could let an attacker gain access to user accounts , carry out web - cache poisoning attacks , and in some instances , execute arbitrary code .
 open source forum software: vulnerable system; vulnerabilities: vulnerability; let an attacker gain access to user accounts: capabilities; carry out web - cache poisoning attacks: capabilities; execute arbitrary code: capabilities
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:
 open source forum software: vulnerable system; vulnerabilities: vulnerability; let an attacker gain access to user accounts: capabilities; carry out web - cache poisoning attacks: capabilities; execute arbitrary code: capabilities