The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Related CVEs

CVE-2023-6863

Key Information

GHSA ID

GHSA-hx5f-6r56-q754

Published

December 19, 2023 3:30 PM

Last Modified

December 22, 2023 12:31 PM

CVSS Score

7.5 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: September 10, 2025 6:31 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.