It was a close race for the top spots in Bugcrowd's Hall of Fame for May 2015, with just 8 points separating the first and third place winners. Researchers who submitted high-severity bugs earned the most Kudos points, with NahtnahS taking the top spot with 152 points for his P1 submissions, which included critical vulnerabilities such as remote code execution and privilege escalation. Bugcrowd's guidelines for vulnerability priorities and Kudos points are in place to help researchers understand what types of bugs are rewarded the most, ranging from high-severity P1 bugs worth 20 points to low-severity issues worth just 5 points. The top three winners received performance bonuses, with NahtnahS earning $2,500, Harie_cool earning $1,500, and nijagaw earning $1,000 for their contributions to the platform's security.