CVE-2019-11718: Activity Stream can display content from sent from the Snippet Service website.

Security readout for executives and security teams

Firefox before version 68 could place remotely supplied Snippet Service content into the Activity Stream page without sanitizing it. If that service were compromised, malicious content might read information available to Activity Stream, including browsing history. The business issue is exposure from old Firefox installations, not a confirmed widespread attack. Exposure is most likely on endpoints still running Firefox versions earlier than 68, including systems relying on old distribution packages. Current supported Firefox deployments are unlikely to be affected based on the provided affected-version statement. Treat this as a legacy browser hygiene issue with privacy implications. Prioritize remediation if the organization still has unmanaged endpoints, old Linux workstations, or frozen application environments using Firefox < 68. Mitigation focus: Upgrade Firefox to version 68 or later, preferably a supported current release.; Apply relevant Gentoo or openSUSE security updates where those distributions manage Firefox.; Retire or isolate endpoints that cannot be upgraded from Firefox < 68..

Prepared

Jun 6, 2026, 14:06 UTC (UTC+00:00)

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