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Application Security

7/29/2020
03:10 PM
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70,000+ WordPress Sites Affected by Critical Plug-in Flaw

A vulnerability in the wpDiscuz plug-in could let attackers remotely execute code on the servers of affected websites.

A critical security flaw in wpDiscuz, a WordPress plug-in, could enable cybercriminals to remotely execute malicious code on vulnerable website servers. The bug has a CVSS score of 10.0.

wpDiscuz is an Ajax real-time comment system that lets users keep their comments in their database. The plug-in, billed as an alternative to Disqus and Jetpack Comments, has more than 70,000 users. It comes with multiple layouts, interactive comment box, and other features.

In a recent version of the plug-in, wpDiscuz added an option for users to add image attachments in their comments. Its implementation lacked security protections and created a critical flaw that allowed attackers to upload arbitrary files, including PHP files, explains Chloe Chamberland of Wordfence, the security company where this vulnerability was discovered, in a blog post. 

Attackers could add image identifying features to files in order to pass the file content verification check. If successful, they could achieve remote code execution on a vulnerable website's server and traverse the hosting account to infect more websites hosted in the account where malicious code was uploaded.

"This would effective give the attacker complete control over every site on your server," Chamberland writes. The vulnerability was discovered in June and reported to the wpDiscuz team, which issued a fix in version 7.0.5 on July 23. 

Read more details in the Wordfence disclosure here.  

 

 

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GVTeam
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GVTeam,
User Rank: Apprentice
7/30/2020 | 12:31:54 PM
All is fixed!
The problem is 100% fixed and wpDiscuz is safe.
You can ignore this if you've already updated to 7.0.5 or higher version (current version is 7.0.6).

This was fixed and the new version 7.0.5 was released a week ago. There is not any issues with current wpDiscuz version. It's 100% secure now.

This kind of issues happens with almost all WordPress plugins, so there is no reason to worry if you've updated and up to date. Just keep updating your plugins and make sure you're using the latest versions.

About 50% of wpDiscuz users are currently using 7.x.x versions. It's about 35,000 websites.
30,000 of them have already updated to secure 7.0.5 and higher versions during last week. And about 3,000 websites are updating every day.

So in one two days there almost certainly won't be any website with old unsecure 7.0.0 – 7.0.4 versions and almost all websites will be up to date and safe.


Thank you!
wpDiscuz Developers
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