Description

WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the frames are cross-origin. Malicious extensions can inject frames from arbitrary origins into the loaded page and then interact with them, bypassing same-origin user expectations with this permission. This vulnerability affects Firefox < 58.

References

http://www.securityfocus.com/bid/102786

http://www.securitytracker.com/id/1040270

https://bugzilla.mozilla.org/show_bug.cgi?id=1396399

https://usn.ubuntu.com/3544-1/

https://www.mozilla.org/security/advisories/mfsa2018-02/

Details

Risk Information

CVSS v2

CVSS v3