CVSS 3.1 Score 6.5 of 10 (medium)


Published Aug 1, 2023
Updated: Sep 11, 2023


CVE-2023-4053 is a vulnerability that affects Firefox versions before 116, Firefox ESR versions before 115.2, and Thunderbird versions before 115.2. This vulnerability allows a website to obscure full screen notifications by using a URL with a scheme handled by an external program, potentially leading to user confusion and spoofing attacks. The vulnerability has a base severity rating of MEDIUM, with an exploitability score of 2.8 out of 10. It requires user interaction and has a low attack complexity. The integrity impact is high, while the confidentiality impact is none. Organizations using the affected products should update to the latest versions to remediate this vulnerability and mitigate potential risks.


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