All BG hosted sites being updated to WordPress 4.7.3 Security Release

WordPress 4.7.3 has just been released. It is the third in a series of recent security releases for WordPress core.

WordPress 4.7.2 was released on January 26th to fix a now famous WordPress defacementvulnerability. WordPress 4.7.1 was released on January 11th which fixed a vulnerability in PHPMailer.

This new 4.7.3 core release fixes three Cross Site Scripting vulnerabilities:

  • Cross-site scripting (XSS) via media file metadata.
  • Cross-site scripting (XSS) via video URL in YouTube embeds.
  • Cross-site scripting (XSS) via taxonomy term names.

It also fixed the following additional security issues:

  • Control characters can trick redirect URL validation.
  • Unintended files can be deleted by administrators using the plugin deletion functionality.
  • Cross-site request forgery (CSRF) in “Press This” leading to excessive use of server resources.

WordPress 4.7.3 also contains 39 maintenance fixes to fix a range of non-security related issues.

On March 6th, the Department of Homeland Security released an upgrade advisory via US-CERT’s National Cyber Awareness System:

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