Version 2.5.1 is a maintenance and security release which fixes a reflected XSS vulnerability when mobile redirection is enabled. For prior affected versions, the fix is backported to new patch releases: v2.0.12, v2.1.5, v2.2.5, v2.3.1, and v2.4.3. These are available in the WordPress.org Plugin Directory but not on GitHub.

For the plugin’s changelog, please see the Releases page on GitHub.