CVE-2020-4070
4.6 · MEDIUMOverview
CVE-2020-4070 is a medium-severity vulnerability affecting w3c css_validator. It was published on June 22, 2020 and has a CVSS 3.1 base score of 4.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from w3c. Update css_validator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| w3c | css_validator | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2020-4070?
CVE-2020-4070 is a medium-severity vulnerability affecting w3c css_validator. It was published on June 22, 2020 and has a CVSS 3.1 base score of 4.6 (MEDIUM).
How severe is CVE-2020-4070?
This vulnerability has a CVSS 3.1 base score of 4.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2020-4070?
Check the references section for vendor advisories and patches from w3c. Update css_validator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-4070?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-4070 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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