Description
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.
Remediation
References
https://github.com/aFarkas/lazysizes/commit/3720ab8262552d4e063a38d8492f9490a231fd48
https://snyk.io/vuln/SNYK-JS-LAZYSIZES-567144
Related Vulnerabilities
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CVE-2014-0193 Vulnerability in maven package io.netty:netty-codec-http
CVE-2020-12265 Vulnerability in npm package decompress
CVE-2021-26540 Vulnerability in maven package org.webjars.npm:sanitize-html