Firefox before 83.0 did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass.
Firefox before 83.0 did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/#CVE-2020-26958 https://bugzilla.mozilla.org/show_bug.cgi?id=1669355
Vulmon