CVE-2022-22759

Name of the Vulnerable Software and Affected Versions Mozilla Firefox versions prior to 97 Mozilla Thunderbird versions prior to 91.6 Firefox ESR versions prior to 91.6

Description The issue is related to insufficient access control in the handling of iframe elements by Mozilla Firefox and Mozilla Thunderbird. An attacker could exploit this by creating a sandboxed iframe without the allow-scripts permission and then appending an element with a JavaScript event handler to the iframe's document, allowing the event handler to run despite the sandbox restrictions.

Recommendations For Mozilla Firefox versions prior to 97, update to version 97 or later to resolve the issue. For Mozilla Thunderbird versions prior to 91.6, update to version 91.6 or later to resolve the issue. For Firefox ESR versions prior to 91.6, update to version 91.6 or later to resolve the issue.