Updates on CyberSecurity, WordPress and what we're cooking in the lab today.

Category Archive: Vulnerabilities

Details of an Additional File Deletion Vulnerability – Patched in WordPress 4.9.7

This entry was posted in Vulnerabilities, Wordfence, WordPress Security on July 5, 2018 by Matt Barry   4 Replies

Today WordPress released version 4.9.7, a security release which addresses two separate arbitrary file deletion vulnerabilities requiring Author privileges. Some details can be found on the WordPress.org blog....read more

Arbitrary File Deletion Flaw Present in WordPress Core

This entry was posted in Vulnerabilities, WordPress Security on June 27, 2018 by Mikey Veenstra   41 Replies

The security community has been abuzz this week following the disclosure of a vulnerability present in all current versions of WordPress. The flaw, published in a detailed report by RIPS Technologies, allows any logged-in user with an Author role or higher to delete files on the server....read more

Service Vulnerability: MelbourneIT Fixes NFS Permissions Problem

This entry was posted in Research, Vulnerabilities on March 30, 2018 by Brad Haas   0 Replies

In February, we wrote about a vulnerability on three shared hosting services.  Following our Vulnerability Disclosure Policy, we had alerted them about vulnerable permissions on shared drives on their servers. They fixed the problem, making things safer both for their customers and for their customers' site visitors....read more

Service Vulnerabilities: 3 Hosting Companies Fix NFS Permissions Problem

This entry was posted in Vulnerabilities, WordPress Security on February 8, 2018 by Brad Haas   37 Replies

In mid-December we updated our Vulnerability Disclosure Policy to include Service Vulnerabilities. A service vulnerability is any issue with a technology service that represents an exploitable security risk for its users. We made this update in response to a growing trend of security issues we've been discovering in commercial services, most often WordPress hosting providers....read more

New Service Vulnerability Disclosure Policy

This entry was posted in Vulnerabilities, Wordfence, WordPress Security on December 13, 2017 by Dan Moen   49 Replies

The Wordfence team regularly discovers security issues with commercial services, such as WordPress hosting providers, that put their users at risk. In some cases, the issue is quite severe, putting thousands of websites at risk simultaneously. In these instances, our standard approach has been to contact the service provider directly, provide them with the details and work with them toward resolution. Lately these issues have become more common, so we've decided to formalize our approach going forward, updating our Vulnerability Disclosure Policy to specifically address these scenarios....read more

Vulnerabilities in Formidable Forms, Duplicator and Yoast SEO Plugins

This entry was posted in Vulnerabilities, WordPress Security on November 16, 2017 by Mark Maunder   16 Replies

Vulnerabilities have been reported in the Formidable Forms, Duplicator and Yoast SEO WordPress plugins. The Premium version of Wordfence protects against all of these vulnerabilities, even if you have not updated your plugins yet. We do recommend that you update immediately, whether or not you are using the Premium version of Wordfence....read more

Zero Day Vulnerability Fixed in Ultimate Form Builder Lite

This entry was posted in Vulnerabilities, WordPress Security on October 23, 2017 by Brad Haas   2 Replies

Last month, we identified three plugins with critical object injection vulnerabilities, all being exploited in the wild. We deployed new and improved firewall rules to block that kind of exploit....read more

12.8% of Sites Have Sensitive File Disclosure Vulnerabilities

This entry was posted in Vulnerabilities, WordPress Security on October 12, 2017 by Dan Moen   5 Replies

As you probably know we launched Gravityscan this May. Gravityscan is a security scanner for any website that serves as a great complement to Wordfence. Yesterday we were analyzing aggregate scan result data from Gravityscan, and we noticed data that surprised us: 12.8% of sites we scan have at least one sensitive file visible to anyone on the internet....read more

Postman SMTP Plugin With Unpatched Vulnerability Removed From Directory

This entry was posted in Vulnerabilities, Wordfence, WordPress Security on October 6, 2017 by Dan Moen   24 Replies

We have received a number of questions regarding the Postman SMTP plugin which was removed from the WordPress.org directory this week. According to an archived snapshot, the plugin is installed on over 100,000 websites. We assume it was removed because it contains a publicly known reflected cross-site scripting (XSS) vulnerability that has not been fixed. Both Wordfence Free and Premium users who have the firewall enabled have been protected against attempts to exploit this vulnerability from day one. In addition, we alerted all Wordfence users who have the plugin installed when it was removed from the plugin directory....read more

3 Zero-Day Plugin Vulnerabilities Being Exploited In The Wild

This entry was posted in Vulnerabilities, WordPress Security on October 2, 2017 by Brad Haas   6 Replies

As part of our site cleaning service, our security analysts track down the method the attacker used to compromise the site. Often this involves quite a bit of investigative work, and recently it led us to find 0-day exploits in three separate plugins. The exploits were elusive: a malicious file seemed to appear out of nowhere, and even sites with access logs only showed a POST request to /wp-admin/admin-ajax.php at the time the file was created. But we captured the attacks in our threat data, and our lead developer Matt Barry was able to reconstruct the exploits. We quickly pushed new WAF rules to block these exploits. Premium customers received the new rules and were protected immediately. We also notified the plugin authors; all three have published updates to fix the vulnerabilities....read more

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