CVE-2021-23414 : Exploit Details and Defense Strategies

Cross-site Scripting (XSS) vulnerability found in video.js version 7.14.3 and below allows attackers to execute arbitrary code by bypassing HTML escaping in the src attribute of the track tag.

Understanding CVE-2021-23414

This CVE-2021-23414 impacts the video.js package before version 7.14.3, enabling attackers to run malicious code by exploiting a specific vulnerability.

What is CVE-2021-23414?

The CVE-2021-23414 is a Cross-site Scripting (XSS) flaw in video.js that permits threat actors to execute arbitrary code through the src attribute of the track tag, circumventing HTML escaping.

The Impact of CVE-2021-23414

This vulnerability poses a medium-level threat with a CVSS base score of 6.5, allowing attackers to compromise the confidentiality and integrity of affected systems.

Technical Details of CVE-2021-23414

The vulnerability in video.js version 7.14.3 and earlier versions enables attackers to perform Cross-site Scripting attacks by injecting and executing malicious code.

Vulnerability Description

The flaw arises due to inadequate HTML escaping in the src attribute of the track tag, giving malicious actors the ability to execute arbitrary code.

Affected Systems and Versions

Affected Vendor: video.js
Affected Product: video.js
Vulnerable Versions: All versions before 7.14.3

Exploitation Mechanism

Attackers exploit this vulnerability by injecting malicious code through the src attribute of the track tag, bypassing HTML escaping mechanisms.

Mitigation and Prevention

To address CVE-2021-23414, immediate steps must be taken to mitigate the risk and secure systems against potential exploitation.

Immediate Steps to Take

Upgrade video.js to version 7.14.3 or newer to eliminate the vulnerability.
Implement input validation to prevent malicious code injection.

Long-Term Security Practices

Regularly update packages and dependencies to prevent known vulnerabilities.
Educate developers on secure coding practices to avoid XSS vulnerabilities.

Patching and Updates

Refer to security advisories from video.js and other relevant sources to stay informed about patches and updates.