CVE-2019-20920

nodejs-handlebars: lookup helper fails to properly validate templates allowing for arbitrary JavaScript execution

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Handlebars before 3.0.8 and 4.x before 4.5.3 is vulnerable to Arbitrary Code Execution. The lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript. This can be used to run arbitrary code on a server processing Handlebars templates or in a victim's browser (effectively serving as XSS).

Handlebars versiones anteriores a 3.0.8 y versiones 4.x anteriores a 4.5.3, son vulnerables a una ejecución de código arbitraria. El asistente de búsqueda no comprueba apropiadamente las plantillas, permitiendo a atacantes enviar plantillas que ejecutan JavaScript arbitrario. Esto se puede ser usado para ejecutar código arbitrario en un servidor que procesa las plantillas de Handlebars o en el navegador de una víctima (que sirve efectivamente como un XSS)

A flaw was found in nodejs-handlebars, where affected versions of handlebars are vulnerable to arbitrary code execution. The package lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript into the system. This issue is used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting). The highest threat from this vulnerability is to confidentiality.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

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

2020-09-30 CVE Reserved
2020-09-30 CVE Published
2024-02-03 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation
CWE-94: Improper Control of Generation of Code ('Code Injection')

CAPEC

References (5)

URL	Tag	Source
https://snyk.io/vuln/SNYK-JS-HANDLEBARS-534478	Third Party Advisory
https://www.npmjs.com/advisories/1324	Third Party Advisory

URL	Date	SRC
https://www.npmjs.com/advisories/1316	2024-08-05

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2019-20920	2023-03-20
https://bugzilla.redhat.com/show_bug.cgi?id=1882260	2023-03-20

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Handlebarsjs Search vendor "Handlebarsjs"		Handlebars Search vendor "Handlebarsjs" for product "Handlebars"				< 3.0.8 Search vendor "Handlebarsjs" for product "Handlebars" and version " < 3.0.8"		node.js		Affected
Handlebarsjs Search vendor "Handlebarsjs"		Handlebars Search vendor "Handlebarsjs" for product "Handlebars"				>= 4.0.0 < 4.5.3 Search vendor "Handlebarsjs" for product "Handlebars" and version " >= 4.0.0 < 4.5.3"		node.js		Affected