By announcing to the world the version of WordPress you are running, you greatly simplify the work of a hacker. Peter Westwood’s post documents how to suppress output of the WordPress version number in feeds and blog posts. I’ve packaged his code in a very rudimentary WordPress plugin which will hide the version number in blog and rss feeds. The plugin only suppresses the WordPress version information automatically inserted by WordPress 2.4+.
You may still need to remove any hard coded version information in your theme. Look for a line like this:
<meta name="generator" content="WordPress <?php bloginfo('version'); ?>" /> <!-- leave this for stats -->
and remove it.
Installation:
- Download the plugin
- Unzip it to your plugins directory
- Activate it
Use at your own risk.
Related post: 9 SEO Security Tips for WordPress
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Sean Carlos is a web marketing consultant & teacher, assisting companies with their Search (SEO + PPC = SEM), Social Media & Digital Media Measurement strategies. Sean first worked with text indexing in 1990 in a project for the Los Angeles County Museum of Art. Since then he worked for Hewlett-Packard Consulting and later as IT Manager of a real estate website before founding Antezeta in 2006. Sean is an 
Would love this plugin to have the option of also removing the RSS feeds. I tried to remove both the WP version and feeds using the functions.php command to no avail.