576
When reached Thursday , Lincoln Russell , a senior developer at Vanilla Forums stressed the vulnerabilities , which are in the middle of being fixed , only affect the company ’s free and open source product .
 ( discover vulnerability: affect,  company: vulnerable system owner, free and open source product: vulnerable system) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: affect,  company: vulnerable system owner, free and open source product: vulnerable system) 