Check Wordpress Version от Francesco De Stefano

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Release 1.8 - WordPress Vulnerability Scanner - Scan for vulnerabilities, version, themes, plugins and much more!
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Add-on allows you to scan self hosted WordPress sites.
It determines if web pages are powered by WordPress and what version they are running.

DISCLAIMER: Usage of this extension without prior mutual consent can be considered as an illegal activity. It is the final user's responsibility to obey all applicable local, state and federal laws. Authors assume no liability and are not responsible for any misuse or damage caused by this program.