CVE-2016-1965: Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 mishandle a navigation sequence that returns t...

Security readout for executives and security teams

This is an older Firefox address-bar spoofing issue. A malicious website could make the browser show a misleading URL after a navigation sequence, increasing phishing risk. The source bundle does not show code execution, data theft by itself, CVSS scoring, or confirmed active exploitation. Likely exposure is user workstations, kiosks, or managed Linux desktops still running Firefox before 45.0 or Firefox ESR before 38.7. The bundle lacks CPE detail, so validation should rely on installed browser and package versions. Medium priority for legacy endpoint risk. Patch during normal security maintenance, but prioritize shared systems and users exposed to untrusted web content because address-bar trust is central to phishing defense. Mitigation focus: Upgrade Firefox to 45.0 or later where applicable.; Upgrade Firefox ESR to 38.7 or later where applicable.; Apply relevant distribution security updates from Ubuntu, Debian, SUSE, or Gentoo..

Prepared

Jun 13, 2026, 21:06 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.