WordPress Yellow Pencil Plugin Flaws Actively Exploited

2 Mins read

Yet some other WordPress plugin, Yellow Pencil Visual Theme Customizer, is being exploited in the wild after two software vulnerabilities had been found. The maker of a WordPress plugin, Yellow Pencil Visual Theme Customizer, asks all users to update after it was found to have software vulnerabilities that might be being actively exploited. The attacker exploiting those flaws has been at the back of numerous different latest plugin attacks those past few weeks, researchers stated. A visible-design plugin that lets users fashion their websites, Yellow Pencil has an active installation base of greater than 30,000 websites. However, the plugin was observed to have two software program vulnerabilities that are now under lively make the most.

Actively Exploited

In a protection update on its internet site, Yellow Pencil advised users to update to the brand new model of the plugin, 7.2. Zero, as soon as possible: “If your website does not redirect to a malware website, your website is not hacked; however you need to update the plugin quickly to the latest version for keeping your website secure. 7.2. Zero version is safe, and all older variations are under hazard now.”

According to WordPress, the plugin became eliminated from the plugin repository on Monday and is now not available for download. A protection researcher then “made the irresponsible and threatening selection to put up a weblog put up together with an evidence of concept (POC) detailing how to take advantage of a set of two software vulnerabilities present within the plugin” – and then the exploits started, Wordfence researchers said. “We see a great extent of attempts to exploit this vulnerability,” researchers with Wordfence said in a Thursday submit outlining the exploits. “Site owners walking the Yellow Pencil Visual Theme Customizer plugin are entreated to take it away from their sites without delay.”


Researchers stated that one of the two flaws within the plugin is a privilege-escalation vulnerability in its yellow pencil. Personal home page document. This document has a function that assessments if a specific request parameter (yp_remote_get) has been set – and if it has, the plugin promptly escalates the users’ privileges to that of an administrator.

That manner that any unauthenticated consumer ought to carry out site admin actions, like converting arbitrary options or more. The 2nd flaw is “a go-web site request forgery (CSRF) take a look at is missing inside the feature underneath that might have made it tons harder to exploit,” researchers said. Yellow Pencil did no longer respond to a request for an additional remark from Threatpost.

Plugin Exploit Specialists?

Researchers with Wordfence stated they are “confident” that the plugin is being exploited using the identical risk actor who has exploited other plugins – together with Social Warfare and Easy WP SMTP, as well as Yuzo Related Posts, which changed into additionally found being exploited this week. That’s because the IP cope with the domain web hosting the malicious script inside the attacks is the same for the exploits in the different attacks.

“We again see commonalities between those take advantage of attempts and assaults on currently located vulnerabilities within the Social Warfare, Easy WP SMTP and Yuzo Related Posts plugins,” they said. “We are assured that everyone’s 4 attack campaigns are the work of the identical danger actor.” Don’t omit our free Threatpost webinar, “Data Security in the Cloud,” on April 24 at 2 p.M. ET. A panel of experts will be a part of Threatpost senior editor Tara Seals to discuss how to lock down records when the traditional network perimeter is now not in place. They will discuss how the adoption of cloud offerings presents new protection challenges, including thoughts and satisfactory practices for locking down this new architecture; whether or not managed or in-residence protection is the manner to head; and ancillary dimensions, like SD-WAN and IaaS.

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