This Opera 12.10 security update fixes following security issues:
-an issue that could cause Opera not to correctly check for certificate revocation;
-an issue where CORS requests could incorrectly retrieve contents of cross origin pages;
-an issue where data URIs could be used to facilitate Cross-Site Scripting;
-a high severity issue, as reported by Gareth Heyes; details will be disclosed at a later date
-an issue where specially crafted SVG images could allow execution of arbitrary code;
-a moderate severity issue, as reported by the Google Security Group; details will be disclosed at a later date

Full changelog available at:
http://www.opera.com/docs/changelogs/unix/1210