The open-source WordPress blogging and content management system (CMS) 4.9.1 update was released on Nov. 29, providing users with security and bug fix improvements.
WordPress is one of the most widely deployed CMS technologies on the internet today, powering 25 percent or more of all websites, according to some estimates. The security updates included in the 4.9.1 update have not been identified with a CVE (Common Vulnerabilities and Exposures) identifier and are considered to be hardening improvements for security resiliency.
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