CVE-2024-0747

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 122 Firefox ESR versions prior to 115.7 Thunderbird versions prior to 115.7

Description The issue is related to errors in security settings, allowing a remote attacker to bypass security restrictions and modify the Content Security Policy (CSP) in isolated iframe environments of Mozilla Firefox, Firefox ESR, and the Thunderbird email client. Specifically, when a parent page loads a child in an iframe with unsafe-inline, the parent Content Security Policy could override the child Content Security Policy.

Recommendations For Firefox versions prior to 122, update to version 122 or later to resolve the issue. For Firefox ESR versions prior to 115.7, update to version 115.7 or later to resolve the issue. For Thunderbird versions prior to 115.7, update to version 115.7 or later to resolve the issue. As a temporary workaround, consider restricting the use of the unsafe-inline attribute in iframes to minimize the risk of exploitation.