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Although maintainers of the open source project patched the vulnerability on Monday , it remains under attack by hackers who are exploiting it to inject commands of their choice into Struts servers that have yet to install the update , researchers are warning .
 researchers: discoverer
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:
 researchers: discoverer