PT-2020-19677 · Github · Lazysizes

Published 2020-04-22 · Updated 2021-12-10 · CVE-2020-7642

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions lazysizes versions through 5.2.0

Description The issue allows execution of malicious JavaScript. The video-embed plugin does not sanitize the following attributes: data-vimeo, data-vimeoparams, data-youtube, and data-ytparams, which can be abused to inject malicious JavaScript.

Recommendations For versions through 5.2.0, consider disabling the video-embed plugin until a patch is available to prevent the injection of malicious JavaScript. Restrict access to the attributes data-vimeo, data-vimeoparams, data-youtube, and data-ytparams to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-7642

GHSA-HG2P-2CVQ-4PPV

SNYK-JS-LAZYSIZES-567144

Affected Products

Lazysizes

References · 5

• 🔥 https://snyk.io/vuln/SNYK-JS-LAZYSIZES-567144 · Exploit
• https://github.com/aFarkas/lazysizes/commit/3720ab8262552d4e063a38d8492f9490a231fd48 · Patch
• https://osv.dev/vulnerability/CVE-2020-7642 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hg2p-2cvq-4ppv · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-7642 · Security Note