CVE-2021-43536

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-200

Affected software

No affected versions have been published.

Timeline

Published: Dec 8, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-435378.8An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitabl CVE-2021-435384.3By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full scre CVE-2021-435398.8Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing CVE-2021-43548.8The PWA for WP & AMP for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the pwaforwp_splashscreen_CVE-2021-435406.5WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been CVE-2021-435416.5When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerabil CVE-2021-435426.5Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. Thi CVE-2021-435436.1Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content. This vu CVE-2021-435446.1When receiving a URL through a SEND intent, Firefox would have searched for the text, but subsequent usages of the address bar might have ca CVE-2021-435456.5Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Fi CVE-2021-435464.3It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor. This vulnerability affects Thunderbi CVE-2021-435478.2TwinOaks Computing CoreDX DDS versions prior to 5.9.1 are susceptible to exploitation when an attacker sends a specially crafted packet to f