Cross-site scripting (XSS) vulnerability in js/wp-seo-metabox.js in the WordPress SEO by Yoast plugin before 2.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the post_title parameter to wp-admin/post-new.php, which is not properly handled in the snippet preview functionality.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-6692
• https://inventropy.us/blog/yoast-seo-plugin-cross-site-scripting-vulnerability/
• https://wordpress.org/plugins/wordpress-seo/changelog/
• https://wordpress.org/support/topic/security-issue-with-post-title-field-xss-vulnerability
• https://yoast.com/wordpress-seo-2-2/
• http://packetstormsecurity.com/files/132294/WordPress-Yoast-2.1.1-Cross-Site-Scripting.html
• http://seclists.org/fulldisclosure/2015/Jun/40
• http://www.securityfocus.com/bid/75196
• http://www.securitytracker.com/id/1032580