CVE-2020-7642

Name: CVE-2020-7642
Creator: NVD / NIST
Published: 2020-04-22T16:15:13.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2020-7642 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

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

5.4/10

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

EPSS Probability

0.89%

54.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Lazysizes Project	Lazysizes	<= 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
Status: Modified

Frequently Asked Questions

What is CVE-2020-7642?

How severe is CVE-2020-7642?

CVE-2020-7642 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7642?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7642?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST