Rapid7 Vulnerability & Exploit Database

MFSA2020-54 Firefox: Security Vulnerabilities fixed in Firefox 84 (CVE-2020-26976)

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MFSA2020-54 Firefox: Security Vulnerabilities fixed in Firefox 84 (CVE-2020-26976)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
12/15/2020
Created
12/16/2020
Added
12/16/2020
Modified
02/03/2021

Description

When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing. This vulnerability affects Firefox < 84.

Solution(s)

  • mozilla-firefox-upgrade-84_0

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