CVE-2021-43530

A Universal XSS vulnerability was present in Firefox for Android resulting from improper sanitization when processing a URL scanned from a QR code. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 94.

• CWE-79

• https://bugzilla.mozilla.org/show_bug.cgi?id=1736886Issue Tracking, Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2021-48/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1736886Issue Tracking, Permissions Required
• https://www.mozilla.org/security/advisories/mfsa2021-48/Vendor Advisory

Published

Dec 8, 2021

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.
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• CVE-2021-43522An issue was discovered in Insyde InsydeH2O with kernel 5.1 …7.5
• CVE-2021-43523In uClibc and uClibc-ng before 1.0.39, incorrect handling of…9.6
• CVE-2021-43527NSS (Network Security Services) versions prior to 3.73 or 3.…9.8
• CVE-2021-43528Thunderbird unexpectedly enabled JavaScript in the compositi…6.5
• CVE-2021-43529Thunderbird versions prior to 91.3.0 are vulnerable to the h…9.8
• CVE-2021-4353The WooCommerce Dynamic Pricing and Discounts plugin for Wor…5.3
• CVE-2021-43531When a user loaded a Web Extensions context menu, the Web Ex…4.3
• CVE-2021-43532The 'Copy Image Link' context menu action would copy the fin…6.1
• CVE-2021-43533When parsing internationalized domain names, high bits of th…4.3
• CVE-2021-43534Mozilla developers and community members reported memory saf…8.8
• CVE-2021-43535A use-after-free could have occured when an HTTP2 session ob…8.8
• CVE-2021-43536Under certain circumstances, asynchronous functions could ha…6.5