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HomeTopics 1Application SecurityWordPress Flaw Exposes Millions: LiteSpeed Cache Plugin Update Critical

WordPress Flaw Exposes Millions: LiteSpeed Cache Plugin Update Critical


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WordPress website owners, brace yourselves! A recent vulnerability discovered in the popular LiteSpeed Cache plugin has exposed millions of websites to potential attacks.

This critical issue, patched in October 2023, highlights the importance of keeping plugins and core software updated to safeguard your website from harm. Let’s delve into the details, understand the risks involved, and explore ways to protect yourself from such vulnerabilities in the future.

Unveiling the Vulnerability:

Discovered in August 2023, the vulnerability resided in the LiteSpeed Cache plugin, which boasts over 4 million active installations. The flaw, tracked as CVE-2023-40000, allowed attackers with contributor-level permissions (think editors or authors) to inject malicious code into website pages. This could have potentially enabled attackers to:

  • Deface websites: Tamper with website content, displaying misleading or malicious information to visitors.
  • Launch phishing attacks: Embed phishing links or forms within the website to steal user credentials or sensitive information.
  • Redirect users to malicious websites: Misdirect users to fraudulent websites designed to steal personal information or spread malware.

Fortunately, the vulnerability was addressed in the October 2023 release (version of the LiteSpeed Cache plugin. However, for websites that haven’t updated their plugin yet, the risk remains.

10 Steps to Secure Your WordPress Website:

  1. Update Immediately: Head to your WordPress dashboard and update the LiteSpeed Cache plugin to the latest version (currently 5.8.2) without delay.
  2. Regular Updates are Key: Make a habit of regularly updating all plugins, themes, and WordPress core software to benefit from the latest security patches and features.
  3. Strong Passwords Matter: Enforce strong and unique passwords for all WordPress user accounts, including administrator and contributor levels.
  4. Limit User Permissions: Grant only the minimum necessary permissions to each user based on their specific needs. For example, avoid giving editor or author roles access to sensitive plugins or themes.
  5. Implement Two-Factor Authentication: Enable two-factor authentication (2FA) for all WordPress user accounts to add an extra layer of security.
  6. Regular Backups: Regularly back up your website’s files and database to a secure location. This allows you to restore your website swiftly in case of an attack or technical issue.
  7. Security Scanner: Consider using a reputable security scanner to identify and address potential vulnerabilities on your website.
  8. Stay Informed: Keep yourself informed about emerging cybersecurity threats and vulnerabilities by following reputable sources and industry publications.
  9. Vulnerability Disclosure: Report any suspected vulnerabilities in plugins or themes to the developers promptly and responsibly.
  10. Choose Reputable Plugins: Opt for plugins from well-established and reputable developers with a track record of addressing security vulnerabilities promptly.


The recent LiteSpeed Cache vulnerability serves as a stark reminder of the importance of maintaining website security. By following these preventative measures and staying vigilant, you can significantly reduce your website’s risk of falling victim to cyberattacks and safeguard your online presence. Remember, proactive security practices are essential for ensuring the safety and integrity of your website and its visitors.

Ouaissou DEMBELE
Ouaissou DEMBELEhttps://cybercory.com
Ouaissou DEMBELE is an accomplished cybersecurity professional and the Editor-In-Chief of cybercory.com. He has over 10 years of experience in the field, with a particular focus on Ethical Hacking, Data Security & GRC. Currently, Ouaissou serves as the Co-founder & Chief Information Security Officer (CISO) at Saintynet, a leading provider of IT solutions and services. In this role, he is responsible for managing the company's cybersecurity strategy, ensuring compliance with relevant regulations, and identifying and mitigating potential threats, as well as helping the company customers for better & long term cybersecurity strategy. Prior to his work at Saintynet, Ouaissou held various positions in the IT industry, including as a consultant. He has also served as a speaker and trainer at industry conferences and events, sharing his expertise and insights with fellow professionals. Ouaissou holds a number of certifications in cybersecurity, including the Cisco Certified Network Professional - Security (CCNP Security) and the Certified Ethical Hacker (CEH), ITIL. With his wealth of experience and knowledge, Ouaissou is a valuable member of the cybercory team and a trusted advisor to clients seeking to enhance their cybersecurity posture.


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