In September 2015, Mozilla disclosed that attackers had compromised a Bugzilla account and accessed sensitive records concerning undisclosed Firefox security vulnerabilities. Mozilla stated that information from those records may subsequently have been used in attacks against Firefox users, turning an internal defect-tracking system into a potential source of intelligence about flaws before patches were available. The disclosure implicated weaknesses in account security and the protection of restricted vulnerability data.
Mozilla responded by resetting Bugzilla passwords, introducing mandatory two-factor authentication, and limiting access to sensitive bug reports. The incident exposed the unusually high stakes of developer collaboration systems: a compromise did not merely reveal user data, but potentially provided an attack roadmap for unpatched software. The lasting consequence was tighter authentication and stricter segregation of security-sensitive information within Bugzilla.
