Cross-site Scripting in CSS Validator
CVE-2020-4070

4.6MEDIUM

Key Information:

Vendor

World Wide Web Consortium (w3c)

Status
Css Validator
Vendor
CVE Published:
22 June 2020

What is CVE-2020-4070?

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.

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Deploy the Patch

Affected Version(s)

CSS Validator <= 54d68a1

References

https://github.com/w3c/css-validator/security/advisories/...
x_refsource_CONFIRM
https://github.com/w3c/css-validator/commit/e5c09a9119167...
x_refsource_MISC

CVSS V3.1

Score:
4.6
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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