CVE-2023-4581

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.

• https://bugzilla.mozilla.org/show_bug.cgi?id=1843758Issue Tracking, Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-35/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-37/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1843758Issue Tracking, Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2023-34/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-35/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-36/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-37/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2023-38/Vendor Advisory

Published

Sep 11, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-45804Rejected reason: User requested a CVE number by mistake
• CVE-2023-45805pdm is a Python package and dependency manager supporting th…7.8
• CVE-2023-45806Discourse is an open source platform for community discussio…5.4
• CVE-2023-45807OpenSearch is a community-driven, open source fork of Elasti…5.4
• CVE-2023-45808iTop is an IT service management platform. When creating or…5.4
• CVE-2023-45809Wagtail is an open source content management system built on…2.7
• CVE-2023-45810OpenFGA is a flexible authorization/permission engine built …7.5
• CVE-2023-45811Synchrony deobfuscator is a javascript cleaner & deobfuscato…7.8
• CVE-2023-45812The Apollo Router is a configurable, high-performance graph …7.5
• CVE-2023-45813Torbot is an open source tor network intelligence tool. In a…7.5
• CVE-2023-45814Bunkum is an open-source protocol-agnostic request server fo…5.3
• CVE-2023-45815ArchiveBox is an open source self-hosted web archiving syste…5.4