Cross-Site Scripting in lazysizes - lazysizes

Description

Versions of lazysizes prior to 5.2.1-rc1 are vulnerable to Cross-Site Scripting. The video-embed plugin fails to sanitize the following attributes: data-vimeo, data-vimeoparams, data-youtube and data-ytparams.

Recommendation

Update the lazysizes package to the latest compatible version. Followings are version details:

• Affected version(s): <= 5.2.1-rc0
• Patched version(s): 5.2.1-rc1

References

• GHSA-w4vp-3mq7-7v82
• www.npmjs.com
• CWE-79
• OWASP 2021-A3

Related Issues

• Cross-Site Scripting in buefy - Vulnerability
• html2pdf.js contains a cross-site scripting vulnerability - CVE-2026-22787
• CKEditor 5 cross-site scripting (XSS) vulnerability in the clipboard package - CVE-2025-58064
• QMarkdown Cross-Site Scripting (XSS) vulnerability - CVE-2025-43954

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How to Secure your NodeJs Express Javascript Application - part 1

How to Secure your NodeJs Express Javascript Application - part 2

10 Secure Coding Best Practices to Follow in Every Project

Tags:

npm

lazysizes