CVE-2020-4070

Cross-site Scripting in CSS Validator

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Published Jun 22, 2020 CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed

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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

World Wide Web Consortium (W3C)

CSS Validator

affected

Version	Status	Constraints
`<= 54d68a1`	affected	—

Configuration 1 [-]

cpe:2.3:a:w3c:css_validator:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2020-25322	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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.550% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b
https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c

History

No history.

Subscriptions

W3c Css Validator

Weaknesses

CWE-79

Sources

CVE record Updated: Aug 4, 2024, 7:52 AM

Status: PUBLISHED
Assigner: GitHub_M
Published: Jun 22, 2020, 3:40 PM
Updated: Aug 4, 2024, 7:52 AM
Reserved: Dec 30, 2019, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:19 AM

Status: Modified
Published: Jun 22, 2020, 4:15 PM
Modified: Jun 17, 2026, 3:19 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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