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CVE-2018-5116

CVE-2018-5116

EPSS 1.1%
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.
Affected products
Mozilla · Firefox

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References
https://bugzilla.mozilla.org/show_bug.cgi?id=1396399https://usn.ubuntu.com/3544-1/https://www.mozilla.org/security/advisories/mfsa2018-02/http://www.securityfocus.com/bid/102786http://www.securitytracker.com/id/1040270