'According to Bleeping Computer, a WordPress plug that goes by the name Display Widgets has been used to install a backdoor on WordPress sites across the internet for the past two and a half months. While the WordPress.org team removed the plugin from the official WordPress Plugins repository, the plugin managed to be installed on more than 200,000 sites at the time of its removal. The good news is that the backdoor code was only found between Display Widgets version 2.6.1 (released June 30) and version 2.6.3 (released September 2), so it's unlikely everyone who installed the plugin is affected. WordPress.org staff members reportedly removed the plugin three times before for similar violations. Bleeping Computer has compiled a history of events in its report, put together with data aggregated from three different investigations by David Law, White Fir Design, and Wordfence. The report adds:

The original Display Widgets is a plugin that allowed WordPress site owners to control which, how, and when WordPress widgets appear on their sites. Stephanie Wells of Strategy11 developed the plugin, but after switching her focus to a premium version of the plugin, she decided to sell the open source version to a new developer who would have had the time to cater to its userbase. A month after buying the plugin in May, its new owner released a first new version -- v2.6.0 -- on June 21'

-- source: https://it.slashdot.org/story/17/09/13/2152234

Cheers, Peter