CVE-2020-7642

MediumCVSS 5.4/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
n/a	lazysizes	All versions including 5.2.0

References

https://github.com/aFarkas/lazysizes/commit/3720ab8262552d4e063a38d8492f9490a231fd48Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-LAZYSIZES-567144Exploit, Third Party Advisory
https://github.com/aFarkas/lazysizes/commit/3720ab8262552d4e063a38d8492f9490a231fd48Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-LAZYSIZES-567144Exploit, Third Party Advisory

Timeline

Published: Apr 22, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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