WordPress Ocean Extra Vulnerability Impacts Up to 600K Sites

The Ocean Extra plug-in has a serious vulnerability that compromises up to 600,000 WordPress websites.

An Ocean Extra WordPress plug-in has been discovered to have a serious security vulnerability that may affect as many as 600,000 websites. A stored cross-site scripting (XSS) exploit is possible under this vulnerability, allowing attackers to inject and execute malicious scripts when users access impacted sites.

Ocean Extra Plugin Overview

The vulnerability concerns the Ocean Extra plugin, which is an extension developed based on the popular OceanWP WordPress theme.

The plugin provides the following functionality to enhance site functionality and customization, including hosting local fonts, extra widgets, and three additional options for the navigation menu.

The Wordfence advisory states the problem is due to inadequate input sanitization and output escaping:

• Input Sanitization: This process blocks unsafe or malicious content by filtering user inputs through form entries or text fields. The Ocean Extra plug-in lacks sufficient sanitization, allowing harmful scripts to bypass security.
• Output Escaping. This complementary method ensures that the displayed material remains harmless and does not contain executable code in browsers. The loosely secure escaping of the output from plugins allows malicious scripts to run and execute on the site.

Collectively, these failures provide attackers with an avenue to upload malicious scripts that will continue to execute once the content on web pages is accessed.

Affectees and Mitigation Steps

This means that the vulnerability requires contributor-level or higher authenticated access, which limits the threat somewhat but still presents a serious risk to compromised or malicious users within the site’s contributor base.

The bug appears across all versions of the plug-in, up to 2.4.9. It is highly recommended that users upgrade to the latest version, 2.5.0, which includes the necessary security patches.

Final Thoughts

The owners of websites using Ocean Extra are encouraged to upgrade their plugins immediately to prevent possible XSS attacks, which may compromise the integrity of their web pages and the security of their users.