Vulnerability · Published Jun 22, 2020 · Assigned by GitHub_M
CVE-2020-4070Cross-site Scripting in CSS Validator
Medium 4.6
In plain English
A medium-severity cross-site scripting in CSS Validator from World Wide Web Consortium (W3C). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).
Severity (CVSS 3.1)4.6Medium
Exploit odds (30 days)0.5%top 53.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In CSS Validator less than or equal to commit 54d68a1, there is a cross-site scripting vulnerability in handling URIs. A user would have to click on a specifically crafted validator link to trigger it. This has been patched in commit e5c09a9.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| World Wide Web Consortium (W3C) | CSS Validator | <= 54d68a1 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N