The vulnerability of the Firefox browser, which allows attackers to carry out spoofing attacks

The vulnerability of Firefox browsers is related to the incorrect installation of the "LINKABLE" and "URISAFEFORUNTRUSTEDCONTENT" flags, which are used for error pages. Exploiting this vulnerability allows a remote attacker to perform spear-phishing attacks using specially crafted URLs...

CVE-2016-5268

Mozilla Firefox before 48.0 does not properly set the LINKABLE and URISAFEFORUNTRUSTEDCONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d=...