CVE-2017-7820
The "instanceof" operator can bypass the Xray wrapper mechanism. When called on web content from the browser itself or an extension the web content can provide its own result fo…
Published: 2018-06-11 · CVSS: Unscored
The "instanceof" operator can bypass the Xray wrapper mechanism. When called on web content from the browser itself or an extension the web content can provide its own result for that operator, possibly tricking the browser or extension into mishandling the element. This vulnerability affects Firefox < 56.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7