CVE-2020-7642 : Vulnerability Insights and Analysis

lazysizes through 5.2.0 allows execution of malicious JavaScript. The following attributes are not sanitized by the video-embed plugin: data-vimeo, data-vimeoparams, data-youtube, and data-ytparams which can be abused to inject malicious JavaScript.

Understanding CVE-2020-7642

This CVE involves a vulnerability in lazysizes up to version 5.2.0 that enables the execution of malicious JavaScript through specific attributes.

What is CVE-2020-7642?

lazysizes up to version 5.2.0 is susceptible to allowing the execution of malicious JavaScript due to unsanitized attributes within the video-embed plugin.

The Impact of CVE-2020-7642

This vulnerability can be exploited to inject and execute malicious JavaScript code, potentially leading to various security risks and attacks.

Technical Details of CVE-2020-7642

lazysizes through version 5.2.0 is affected by this vulnerability.

Vulnerability Description

The issue arises from the lack of sanitization for specific attributes like data-vimeo, data-vimeoparams, data-youtube, and data-ytparams, allowing for the injection of malicious JavaScript.

Affected Systems and Versions

Product: lazysizes
Vendor: n/a
Versions affected: All versions including 5.2.0

Exploitation Mechanism

The vulnerability can be exploited by injecting malicious JavaScript through the unsanitized attributes mentioned above.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Update to the latest version of lazysizes that includes a patch for this vulnerability.
Implement input sanitization to prevent the injection of malicious code through attributes.

Long-Term Security Practices

Regularly monitor for security updates and patches for all software components.
Conduct security audits to identify and mitigate vulnerabilities proactively.

Patching and Updates

Apply patches provided by the vendor promptly to secure the system against potential exploits.