CVSS 3.1 Score 4.3 of 10 (medium)


Published Sep 11, 2023
Updated: Sep 14, 2023


CVE-2023-4581 is a vulnerability that affects Firefox versions prior to 117, Firefox ESR versions prior to 102.15 and 115.2, Thunderbird versions prior to 102.15 and 115.2. The vulnerability allows Excel `.xll` add-in files to be downloaded without any warning of their potential harm in Firefox. The vulnerability has a base severity level of MEDIUM with a base score of 4.3 according to [email protected], and it requires user interaction for exploitation. The impact is rated as LOW in terms of confidentiality, as it poses a potential danger to the organization by allowing potentially harmful files to be downloaded without warning in Firefox.


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