Rapid7 Vulnerability & Exploit Database

MFSA2020-52 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.5 (CVE-2020-26958)

Back to Search

MFSA2020-52 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.5 (CVE-2020-26958)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
11/17/2020
Created
11/19/2020
Added
11/18/2020
Modified
12/14/2020

Description

Firefox 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. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Solution(s)

  • mozilla-thunderbird-upgrade-78_5

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;