WooCommerce is a popular open-source eCommerce plugin for WordPress, with more than 5 million installations to date, making it an attractive target for cybercriminals.

On Thursday, WooCommerce said that on July 13 it received a report of a critical vulnerability in the plugin, urging users to update their installations as soon as possible, but without providing additional information on the bug itself.

“Upon learning about the issue, our team immediately conducted a thorough investigation, audited all related codebases, and created a patch fix for every impacted version (90+ releases) which was deployed automatically to vulnerable stores,” the WooCommerce team said.