CVE-2020-4070

Published: Jun 22, 2020Modified: Jun 17, 2026

5.4

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Exploitability: 2.3 / Impact: 2.7

Source: NVD

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 (1)

Products: W3c: Css Validator

W3c

1 product

Css Validator

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
W3c Css Validator	Up to 2020-01-19

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b

Source: security-advisories@github.com

Patch

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

Source: security-advisories@github.com

Vendor Advisory

https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b

Source: af854a3a-2127-422b-91ae-364da2661108

Patch

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

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.