Vulnerabilities > CVE-2021-23995 - Operation on a Resource after Expiration or Release vulnerability in Mozilla Firefox

047910
CVSS 5.1 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
high complexity
mozilla
CWE-672

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.

Vulnerable Configurations

Part Description Count
Application
Mozilla
1101