CVE-2011-0681: The Cascading Style Sheets (CSS) Extensions for XML implementation in Opera before 11.01 recognizes links t...

Security readout for executives and security teams

This is an old Opera browser flaw fixed in Opera 11.01. A malicious page could use an Opera-specific CSS XML feature to make javascript: links survive CSS filtering, weakening defenses that tried to strip dangerous links from untrusted content. Exposure is likely limited to environments still running Opera before 11.01 or testing legacy web content with that browser. Modern fleets are unlikely to be affected unless old Opera builds remain on kiosks, lab systems, or unsupported endpoints. Treat as a legacy-browser hygiene issue. It should not drive emergency response without evidence of affected Opera deployments, but any remaining pre-11.01 installations should be retired or updated promptly. Mitigation focus: Upgrade Opera installations to 11.01 or later.; Remove unsupported pre-11.01 Opera builds from managed endpoints.; Check vendor changelogs before accepting any compensating control as sufficient..

Prepared

Jun 28, 2026, 01:17 UTC (UTC+00:00)

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