5.4
MEDIUM
CVE-2020-4070
"CSS Validator Cross-Site Scripting Vulnerability"
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.

INFO

Published Date :

June 22, 2020, 4:15 p.m.

Last Modified :

June 30, 2020, 1:39 p.m.

Remotely Exploitable :

Yes !

Impact Score :

2.7

Exploitability Score :

2.3
Affected Products

The following products are affected by CVE-2020-4070 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 W3c css_validator
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-4070.

URL Resource
https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b Patch
https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-4070 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-4070 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jun. 30, 2020

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:S/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Changed Reference Type https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b No Types Assigned https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b Patch
    Changed Reference Type https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c No Types Assigned https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:a:w3c:css_validator:*:*:*:*:*:*:*:* versions up to (including) 2020-01-19
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-4070 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-4070 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.00%

score

0.20649

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability