Quy Pham

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 153 Firefox ESR versions prior to 140.13 Thunderbird versions prior to 153 Thunderbird versions prior to 140.13 **Description** Privilege escalation exists in WebExtensions, allowing an attacker to gain higher levels of access than intended. **Recommendations** Update Firefox to version 153 or later. Update Firefox ESR to version 140.13 or later. Update Thunderbird to version 153 or later. Update Thunderbird to version 140.13 or later.

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12 **Description** A sandbox escape exists within the DOM: Workers component. A sandbox is a security mechanism for separating running programs, usually in an effort to mitigate system failures or software vulnerabilities from spreading. **Recommendations** Update Firefox to version 152. Update Firefox ESR to version 140.12. Update Firefox ESR to version 115.37. Update Thunderbird to version 152. Update Thunderbird to version 140.12.