TI-2020-06163 Aliases CVE-2020-7642 GHSA-hg2p-2cvq-4ppv

Cross-site scripting in lazysizes

LOW 26CWE-79Published 2020-04-22 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

EPSS 0.00889 59th percentileScored 2026-11-07

Fix Fixed lazysizes (npm): 5.2.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	lazysizes	All versions including 5.2.0	—	No fix listed	CNA
—	lazysizes (npm)	before 5.2.1	5.2.1	Patch available	GHSA-hg2p-2cvq-4ppv

lazysizes Vendor— Affected All versions including 5.2.0 Fixed in — No fix listed CNA
lazysizes (npm) Vendor— Affected before 5.2.1 Fixed in 5.2.1 Patch available GHSA-hg2p-2cvq-4ppv

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:lazysizes_project:lazysizes::::::::	up to 5.2.0	Vulnerable	Lazysizes Project

cpe:2.3:a:lazysizes_project:lazysizes:*:*:*:*:*:*:*:* Versions up to 5.2.0 Vulnerable ·Lazysizes Project

Remediation

Fix · GHSA-hg2p-2cvq-4ppv lazysizes (npm) Fixed in 5.2.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2020-7642
2026-10-03 Alias added: GHSA-hg2p-2cvq-4ppv

References

Patch 1

https://github.com/aFarkas/lazysizes/commit/3720ab8262552d4e063a38d8492f9490a231fd48

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2020-7642

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences