Security Advisory
CVE-2018-5116
9.8
CRITICAL
Vulnerability 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.
Published Date
June 11, 2018
Official Source
NIST NVD Advisory