WebExtensions could use popups and panels in the extension UI to load an "about:" privileged URL, violating security checks that disallow this behavior. This vulnerability affects Firefox < 56.
http://www.securitytracker.com/id/1039465
http://www.securityfocus.com/bid/101057
https://www.mozilla.org/security/advisories/mfsa2017-21/
https://bugzilla.mozilla.org/show_bug.cgi?id=1380597
Source: Mitre, NVD
Published: 2018-06-11
Updated: 2024-11-21
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.00331