Mozilla · Firefox · CVE-2021-23968
Name of the Vulnerable Software and Affected Versions:
Firefox versions prior to 86
Thunderbird versions prior to 78.8
Firefox ESR versions prior to 78.8
Description:
A security issue was found where Content Security Policy blocked frame navigation, potentially leaking sensitive information contained in URIs. This could be used to reveal the full destination of a redirect served in the frame, as opposed to the original frame URI.
Recommendations:
For Firefox versions prior to 86, update to version 86 or later to resolve the issue.
For Thunderbird versions prior to 78.8, update to version 78.8 or later to resolve the issue.
For Firefox ESR versions prior to 78.8, update to version 78.8 or later to resolve the issue.