CVE-2020-4070 describes a cross-site scripting (XSS) vulnerability in the W3C CSS Validator, affecting versions up to commit 54d68a1. This flaw allows an attacker to inject malicious scripts if a user clicks on a specially crafted validator link. Rated as Medium severity with a CVSS score of 5.4, successful exploitation requires user interaction and could lead to limited impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2020-01-19CPE matchmatch criteria | cpe:2.3:a:w3c:css_validator:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.