By using the reflected URL in some special resource URIs, such as chrome:, it is possible to inject stylesheets and bypass Content Security Policy (CSP). This vulnerability affects Firefox < 63.
http://www.securityfocus.com/bid/105721
http://www.securitytracker.com/id/1041944
https://bugzilla.mozilla.org/show_bug.cgi?id=1460538
https://bugzilla.mozilla.org/show_bug.cgi?id=1488061
Source: MITRE
Published: 2019-02-28
Updated: 2019-10-03
Type: NVD-CWE-noinfo
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM