WordPress Vulnerabilities Digest - April 2021 Part 2

The WordPress Vulnerability Roundup is divided into three different categories: WordPress core, WordPress plugins, and WordPress themes.

WordPress Core Vulnerabilities

Great news! No new WordPress core vulnerabilities have been disclosed this month.

The latest version of WordPress is currently 5.7. Make sure all your websites are running the latest version of WordPress core.

WordPress Plugin Vulnerabilities

1. iThemes Security Free & Pro

Vulnerability: Hide Backend Bypass Patched in Version (iThemes Security): 7.9.1 Patched in Version (iThemes Security Pro): 6.8.4 Severity: High

The Hide Backend feature in iThemes Security allows users to hide the login page by changing its name and preventing access to wp-login.php and wp-admin. A bug was discovered in versions below 7.9.1 of iThemes Security and below 6.8.4 of iThemes Security Pro that make the hidden login page discoverable, reducing the effectiveness of the feature.

Update to version 7.9.1 of iThemes Security and 6.8.4 of iThemes Security Pro to receive the Hide Backed bypass workaround patch.

Note: You should be aware that the hide backend feature isnt full-proof no matter how much we try to improve it. In fact, the effectiveness of hiding the login page of your website for security reasons is our #1 WordPress security myth. Why? The truth is that you cant completely hide the backend of your website. The login page may be exposed by WordPress core, plugins, or themes when printing links to the login page (like Privacy Request Confirmations or front-end login forms).

2. Simple Membership

Vulnerability: Authenticated SQL Injections Patched in Version: 4.0.4 Severity: Critical

The vulnerability is patched, so you should update to version 4.0.4.

3. WPBakery Page Builder Clipboard

Vulnerability: Subscriber+ Stored Cross-Site Scripting Patched in Version: 4.5.6 Severity: Critical

Vulnerability: Unauthorized Arbitrary License Options Update Patched in Version: 4.5.8 Severity: Medium

The vulnerability is patched, so you should update to version 4.5.8+.

4. OpenID Connect Generic Client

Vulnerability: Reflected Cross-Site Scripting Patched in Version: 3.8.2 Severity: Medium

The vulnerability is patched, so you should update to version 3.8.2+.

5. Stop Spammers

Vulnerability: Reflected Cross-Site Scripting Patched in Version: 2021.9 Severity: Medium

The vulnerability is patched, so you should update to version 2021.9.

6. Imagements

Vulnerability: Unauthenticated Arbitrary File Upload to RCE Patched in Version: No known fix Severity: Critical

This vulnerability has NOT been patched. Uninstall and delete the plugin until a patch is released.

7. WorkScout Core Plugin

Vulnerability: Authenticated Stored XSS & XFS Patched in Version: 1.3.4 Severity: High

The vulnerability is patched, so you should update to version 1.3.4+.

8. Larsens Calender

Vulnerability: Stored Cross-Site Scripting Patched in Version: No known fix Severity: High

This vulnerability has NOT been patched. Uninstall and delete the plugin until a patch is released.

9. Contact Form Check Tester

Vulnerability: Broken Access Control to Cross-Site Scripting Patched in Version: No known fix Severity: High

This vulnerability has NOT been patched. Uninstall and delete the plugin until a patch is released.

10. Business Directory Plugin

Vulnerability: Arbitrary Listing Export Patched in Version: 5.11.2 Severity: High

Vulnerability: Arbitrary Payment History Update Patched in Version: 5.11.2 Severity: Medium

Vulnerability: Authenticated Stored Cross-Site Scripting Patched in Version: 5.11.2 Severity: Medium

The vulnerability is patched, so you should update to version 5.11.2+.

11. Event Banner

Vulnerability: Arbitrary File Upload to RCE Patched in Version: No known fix Severity: Critical

This vulnerability has NOT been patched. Uninstall and delete the plugin until a patch is released.

12. Classyfrieds

Vulnerability: Authenticated Arbitrary File Upload to RCE Patched in Version: No known fix Severity: Critical

This vulnerability has NOT been patched. Uninstall and delete the plugin until a patch is released.

13. College Publisher Import

Vulnerability: Arbitrary File Upload to RCE Patched in Version: No known fix Severity: Critical

This vulnerability has NOT been patched. Uninstall and delete the plugin until a patch is released.

WordPress Themes Vulnerabilities

1. WorkScout Core Theme

Vulnerability: Authenticated Stored XSS & XFS Patched in Version: 2.0.33 Severity: High

The vulnerability is patched, so you should update to version 2.0.33+.

If you are under WordPress Managed Maintenance plan - there is nothing to worry about as we've taken the necessary steps to protect your sites. Yay!

The information for this blog post was taken from iThemes Vulnerability Roundup

If you're not under our maintenance plan... well, what are you waiting for? Sign-up today!