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The second critical vulnerability revolves around session fixation , which can allow an attacker to elevate privileges by impersonating another user in the system .
 discover vulnerability: revolves around
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: revolves around