Anca Soncutean

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 66 **Description** A vulnerability exists during authorization prompting for FTP transactions where successive modal prompts are displayed and cannot be immediately dismissed, allowing for a denial of service attack. The issue is related to an error in the FTP protocol authorization, which can be exploited by a remote attacker to cause a denial of service. **Recommendations** For versions prior to 66, update to version 66 or later to resolve the issue. As a temporary workaround, consider avoiding the use of FTP transactions in the affected browser versions until a patch is applied.