← Back

CVE-2021-23995

nvd nist
Published: Jun 24, 2021Modified: Jun 17, 2026

JSON object

Loading...
8.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitability: 2.8 / Impact: 5.9
Source: NVD

Description

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.

Affected (3)

Mozilla
3 products
Firefox
Firefox Esr
Thunderbird
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Firefox
Before 88.0
Firefox Esr
Before 78.10
Thunderbird
Before 78.10

Related CWEs

CWE-672
Operation on a Resource after Expiration or Release
The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.

References (8)

Source: security@mozilla.org
Issue TrackingPermissions RequiredVendor Advisory
Source: security@mozilla.org
Release NotesVendor Advisory
Source: security@mozilla.org
Release NotesVendor Advisory
Source: security@mozilla.org
Release NotesVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Issue TrackingPermissions RequiredVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Release NotesVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Release NotesVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Release NotesVendor Advisory

Timeline

No history available yet.