4.3
CVSSv3

CVE-2021-43538

Published: 08/12/2021 Updated: 09/12/2022
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 4.3 | Impact Score: 1.4 | Exploitability Score: 2.8
VMScore: 383
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Summary

By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Vulnerability Trend

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mozilla firefox esr

mozilla thunderbird

mozilla firefox

debian debian linux 9.0

debian debian linux 10.0

debian debian linux 11.0

Vendor Advisories

Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, information disclosure or spoofing Debian follows the extended support releases (ESR) of Firefox Support for the 78x series has ended, so starting with this update we're now following the 91x releases ...
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code, spoofing, information disclosure, downgrade attacks on SMTP STARTTLS connections or misleading display of OpenPGP/MIME signatures For the oldstable distribution (buster), these problems have been fixed in version 1:9141-1~deb10u1 For ...
A security issue has been found in Firefox before version 95 and Thunderbird before version 9140 By misusing a race in the notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks ...
Mozilla Foundation Security Advisory 2021-52 Security Vulnerabilities fixed in Firefox 95 Announced December 7, 2021 Impact high Products Firefox Fixed in Firefox 95 ...
Mozilla Foundation Security Advisory 2021-53 Security Vulnerabilities fixed in Firefox ESR 9140 Announced December 7, 2021 Impact high Products Firefox ESR Fixed in Firefox ESR 914 ...
Mozilla Foundation Security Advisory 2021-54 Security Vulnerabilities fixed in Thunderbird 9140 Announced December 7, 2021 Impact high Products Thunderbird Fixed in Thunderbird 914 ...