Home > News > WP Fastest Cache Vulnerability Exposes 600K Sites! โš ๏ธ Act Now! ๐Ÿšจ

WP Fastest Cache Vulnerability Exposes 600K Sites! โš ๏ธ Act Now! ๐Ÿšจ

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WordPress, a widely-used content management system, faces a new challenge with the discovery of a critical WP Fastest Cache Vulnerability. This flaw, identified as CVE-2023-6063, poses a serious threat to over 600,000 WordPress sites, underscoring the importance of cybersecurity in the digital landscape.

Understanding the WP Fastest Cache Plugin

WP Fastest Cache, a popular WordPress plugin, is designed to enhance website performance by caching pages and reducing load times. It has garnered significant adoption due to its effectiveness and ease of use. However, recent findings have exposed a severe SQL injection vulnerability in versions lower than 1.2.2.

The Core of the WP Fastest Cache Vulnerability

The vulnerability centers around the is_user_admin function within the WpFastestCacheCreateCache class. This function, called from createCache, is vulnerable to SQL injection attacks. The exploitation is possible because the plugin executes this function at load time, prior to the applicationโ€™s data sanitization by wp_magic_quotes().

An attacker can exploit this by manipulating the $username variable, sourced from a specific cookie, to inject a time-based blind SQL payload. This could lead to unauthorized access to sensitive data stored in the WordPress database.

Risks and Implications

The potential damage from this vulnerability is significant. Unauthorized access to a siteโ€™s database can lead to data theft, website defacement, and even a complete takeover of the site. This not only compromises the security of the site but also risks the privacy of its users.

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Mitigation and Response

In response to the discovery, the developers of WP Fastest Cache swiftly released version 1.2.2 to address and patch the flaw. Website administrators using this plugin must urgently update to this latest version to protect their sites from potential attacks.

WPScan, the team behind the discovery, plans to release detailed insights and a proof-of-concept on Nov. 27, 2023. This will provide further understanding of the vulnerability and its potential exploitation.

The Broader Context of WordPress Security

WordPress's popularity makes it a frequent target for cybercriminals. This incident serves as a reminder of the importance of regular updates and vigilance in the digital space.

The Role of Automated Patch Management

To combat such vulnerabilities, the use of automated patch management solutions like Patch Manager Plus is recommended. These tools ensure that third-party applications and plugins are consistently updated, closing potential security gaps.

Proactive Measures for WordPress Site Owners

Beyond updating plugins, site owners should take a proactive stance on security:

  • Regularly audit installed plugins and themes for updates or security patches.
  • Implement strong password policies and two-factor authentication for admin accounts.
  • Regularly back up the site to mitigate potential data loss from attacks.


The WP Fastest Cache vulnerability highlights the ever-present need for robust cybersecurity measures in managing websites. By staying informed and proactive, WordPress site owners can significantly reduce their vulnerability to such threats.


What is the WP Fastest Cache plugin?

It's a plugin for WordPress sites designed to improve performance through caching.

What is the CVE-2023-6063 vulnerability?

A critical SQL injection vulnerability in WP Fastest Cache affecting versions lower than 1.2.2.

How does the vulnerability affect WordPress sites?

It could allow unauthorized SQL injections, leading to data theft or site compromise.

What should WordPress site owners do?

Update the WP Fastest Cache plugin to version 1.2.2 or higher immediately.

Where can I find more information about this vulnerability?

Detailed information will be published by WPScan on Nov. 27, 2023. Check their official website and the CVE database for updates.

Further Reading and Resources:

For more information on securing WordPress sites and understanding this specific vulnerability, the following resources are recommended:


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