WebExtensions could have installed persistent ServiceWorkers (CVE-2021-43540).GC rooting failure when calling wasm instance methods (CVE-2021-43539).Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538).Heap buffer overflow when using structured clone (CVE-2021-43537).URL leakage when navigating while executing asynchronous function (CVE-2021-43536).JavaScript unexpectedly enabled for the composition area (CVE-2021-43528).Details of these vulnerabilities are as follows: Multiple vulnerabilities have been discovered in Mozilla Firefox, Firefox Extended Support Release (ESR), and Thunderbird, the most severe of which could allow for arbitrary code execution.
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