URGENT Cybersecurity Threat! New WebP Vulnerability


In today’s digital age, small and medium-sized businesses (SMBs) rely heavily on the internet to conduct their operations. From maintaining websites to sharing graphics and images, businesses often use various file formats, one of which is WebP. While WebP has gained popularity for its efficiency and compression capabilities, it’s essential for SMB owners to be aware of recent vulnerabilities and take necessary precautions to protect their online assets. Two vulnerabilities have been discovered in WebP, and it’s crucial for SMB owners to understand the risks associated with each.

Understanding the WebP Vulnerabilities

1. Old WebP Vulnerability (2021):

   – The old WebP vulnerability primarily affected servers and websites that host WebP images. Attackers could exploit this vulnerability to execute malicious code or launch attacks that compromised the integrity of websites, stole sensitive data, or disrupted online presence. Key points included:

     – Remote Code Execution

     – Denial of Service (DoS) Attacks

     – Sensitive Data Exposure

2. New WebP Vulnerability (2023):

   – On September 27th, 2023, a new WebP vulnerability emerged, adding another layer of concern for businesses. This vulnerability primarily affects users who view WebP images in their browsers, potentially leading to malicious code execution on the client side. Key points of the new WebP vulnerability include:

     – Client-Side Exploitation: Attackers can craft malicious WebP images that, when viewed in a vulnerable browser, can execute arbitrary code on the user’s device.

     – Browser and Plugin Vulnerabilities: The new vulnerability relies on vulnerabilities in specific browsers and WebP image rendering plugins. As such, not all but most popular browsers are affected.

     – Drive-By Attacks: Users may unknowingly encounter these malicious images while browsing, leading to the automatic execution of harmful code.

Mitigating the WebP Vulnerabilities

To protect your business from both old and new WebP vulnerabilities, follow these essential steps:

1. Keep Software Up-to-Date:

   – Regularly update your web server software, content management system (CMS), and any image processing libraries that handle WebP files. Developers often release patches and updates to address security vulnerabilities.

2. Use Web Application Firewalls (WAFs):

   – Implement a WAF to filter incoming web traffic and block malicious requests that attempt to exploit vulnerabilities. Many WAFs come with built-in security rules for known vulnerabilities.

3. Monitor Server Activity:

   – Set up server monitoring tools to detect unusual or suspicious activities, such as an influx of requests for WebP files. Early detection can help you respond swiftly to potential attacks.

4. Validate User-Uploaded Content:

   – If your website allows users to upload images or other files, validate and sanitize user input to prevent the upload of malicious WebP images.

5. Disable WebP Support if Not Needed:

   – If your website does not heavily rely on WebP images, consider disabling WebP support temporarily until you can confirm that your server and CMS are adequately patched and protected.

6. Backup and Disaster Recovery:

   – Regularly back up your website and critical data. In case of an attack or server compromise, having a recent backup can minimize downtime and data loss.

7. Stay Informed:

   – Keep yourself informed about the latest cybersecurity threats and vulnerabilities, especially those related to the technologies you use. Subscribe to security news sources and consult with IT professionals when necessary.


As an SMB owner, protecting your technology assets is paramount in an era where digital presence is crucial for business success. Understanding and mitigating both old and new WebP vulnerabilities are proactive steps toward safeguarding your website and data. By staying vigilant, keeping your software up-to-date, and implementing security measures, you can minimize the threat posed by these vulnerabilities and ensure the continued smooth operation of your business in the digital landscape.

What if I Need Help?

If you find yourself uncertain or overwhelmed when it comes to mitigating WebP vulnerabilities, remember that you’re not alone. Safeguarding your digital assets is a top priority, and we’re here to assist you. Whether you need help securing your web server, implementing security measures, or conducting a thorough security audit, our experts are ready to tailor solutions to your specific needs. Our guidance and expertise are invaluable in fortifying your digital defenses and ensuring the long-term security of your business in the online realm. Don’t hesitate to reach out to us; your digital security is our concern too.

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