Gregory Pappas

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 130 Firefox ESR versions prior to 128.2 Firefox ESR versions prior to 115.15 Thunderbird versions prior to 128.2 Thunderbird versions prior to 115.15 **Description** Internal browser event interfaces were exposed to web content when privileged EventHandler listener callbacks ran for those events. This issue could indicate certain browser features had been used, such as when a user opened the Dev Tools console. Web content that tried to use those interfaces would not be able to use them with elevated privileges. **Recommendations** For Firefox versions prior to 130, update to version 130 or later. For Firefox ESR versions prior to 128.2, update to version 128.2 or later. For Firefox ESR versions prior to 115.15, update to version 115.15 or later. For Thunderbird versions prior to 128.2, update to version 128.2 or later. For Thunderbird versions prior to 115.15, update to version 115.15 or later.