8.8
CVSSv3

CVE-2021-23995

Published: 24/06/2021 Updated: 02/07/2021
CVSS v2 Base Score: 5.1 | Impact Score: 6.4 | Exploitability Score: 4.9
CVSS v3 Base Score: 8.8 | Impact Score: 5.9 | Exploitability Score: 2.8
VMScore: 454
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Vulnerability Summary

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

Vulnerability Trend

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mozilla firefox

mozilla firefox esr

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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, privilege escalation or spoofing For the stable distribution (buster), these problems have been fixed in version 78100esr-1~deb10u1 We recommend that you upgrade your firefox-esr ...
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure In adddition a number of security issues were addressed in the OpenPGP support For the stable distribution (buster), these problems have been fixed in version 1:78100-1~deb10u1 We recommend that you upgrade y ...
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine This vulnerability affects Firefox &lt; 85 (CVE-2021-23991) (CVE-2021-23992) (CVE-2021-23961) (CVE-2021-23993) (CVE-2021-23994) (CVE-2021-23995) (CVE- ...
A security issue has been found in Firefox before version 88 and Thunderbird before version 7810 When Responsive Design Mode was enabled, it used references to objects that were previously freed Mozilla presumes that with enough effort this could have been exploited to run arbitrary code ...
Mozilla Foundation Security Advisory 2021-16 Security Vulnerabilities fixed in Firefox 88 Announced April 19, 2021 Impact high Products Firefox Fixed in Firefox 88 ...
Mozilla Foundation Security Advisory 2021-15 Security Vulnerabilities fixed in Firefox ESR 7810 Announced April 19, 2021 Impact high Products Firefox ESR Fixed in Firefox ESR 7810 ...
Mozilla Foundation Security Advisory 2021-14 Security Vulnerabilities fixed in Thunderbird 7810 Announced April 19, 2021 Impact high Products Thunderbird Fixed in Thunderbird 7810 ...