2033
A severe vulnerability has been disclosed in libpurple , the library used in the development of a number of popular instant messaging clients , including Pidgin and Adium for the macOS platform .
 ( discover vulnerability: has been disclosed,  libpurple: vulnerable system, A severe vulnerability: vulnerability) 
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: has been disclosed,  libpurple: vulnerable system, A severe vulnerability: vulnerability) 