CVE-2020-4054

Cross-site Scripting in Sanitize

Severity Score

7.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In Sanitize (RubyGem sanitize) greater than or equal to 3.0.0 and less than 5.2.1, there is a cross-site scripting vulnerability. When HTML is sanitized using Sanitize's "relaxed" config, or a custom config that allows certain elements, some content in a math or svg element may not be sanitized correctly even if math and svg are not in the allowlist. You are likely to be vulnerable to this issue if you use Sanitize's relaxed config or a custom config that allows one or more of the following HTML elements: iframe, math, noembed, noframes, noscript, plaintext, script, style, svg, xmp. Using carefully crafted input, an attacker may be able to sneak arbitrary HTML through Sanitize, potentially resulting in XSS (cross-site scripting) or other undesired behavior when that HTML is rendered in a browser. This has been fixed in 5.2.1.

En Sanitize (RubyGem sanitize) versiones mayor o igual a 3.0.0 y menor a 5.2.1, se presenta una vulnerabilidad de tipo cross-site scripting. Cuando se sanea HTML usando la configuración "relaxed" de Sanitize, o una configuración personalizada que permite determinados elementos, algún contenido en un elemento math o svg puede no ser saneado correctamente incluso si math y svg no están en la lista de permitidos. Es probable que sea vulnerable a este problema si usa la configuración relaxed de Sanitize o una configuración personalizada que permite uno o más de los siguientes elementos HTML: iframe, math, noembed, noframes, noscript, plaintext, script, style, svg, xmp. Usando entradas cuidadosamente diseñada, un atacante puede infiltrar HTML arbitrario por medio de Sanitize, resultando potencialmente en un ataque de tipo XSS (cross-site scripting) u otro comportamiento no deseado cuando ese HTML es renderizado en un navegador. Esto se ha corregido en la versión 5.2.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-30 CVE Reserved
2020-06-16 CVE Published
2024-04-20 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (5)

URL	Tag	Source
https://github.com/rgrove/sanitize/releases/tag/v5.2.1	Release Notes
https://github.com/rgrove/sanitize/security/advisories/GHSA-p4x4-rw2p-8j8m	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://github.com/rgrove/sanitize/commit/a11498de9e283cd457b35ee252983662f7452aa9	2020-09-28

URL	Date	SRC
https://usn.ubuntu.com/4543-1	2020-09-28
https://www.debian.org/security/2020/dsa-4730	2020-09-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Sanitize Project Search vendor "Sanitize Project"		Sanitize Search vendor "Sanitize Project" for product "Sanitize"				>= 3.0.0 < 5.2.1 Search vendor "Sanitize Project" for product "Sanitize" and version " >= 3.0.0 < 5.2.1"		ruby		Affected