CVE-2023-4581

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CVSS 3.1

4.3 medium

EPSS

<1%p45

Published

Sep 11, 2023 (Sep 11, 2023)

Modified

Jun 17, 2026

Description

Excel `.xll` add-in files did not have a blocklist entry in Firefox's executable blocklist which allowed them to be downloaded without any warning of their potential harm. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.

Vendors: mozilla
Products: firefox, firefox esr, thunderbird
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.6%)

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