Prototype Pollution in Handlebars Affecting npm Products
CVE-2019-19919

9.8CRITICAL

Key Information:

Vendor

Handlebars.js Project

Status
Handlebars.js
Vendor
CVE Published:
20 December 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 16%

What is CVE-2019-19919?

Handlebars, a popular templating engine for JavaScript, is susceptible to a prototype pollution vulnerability which can enable remote code execution. This issue arises in versions earlier than 4.3.0, allowing an attacker to manipulate an object's proto and defineGetter properties through specially crafted payloads. Such manipulation may lead to arbitrary code execution in the context of the vulnerable application, posing significant security risks.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-19919
Created by fazilbaig1

References

https://www.npmjs.com/advisories/1164
x_refsource_MISC
https://www.tenable.com/security/tns-2021-14
x_refsource_CONFIRM

EPSS Score

16% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2019-19919 : Prototype Pollution in Handlebars Affecting npm Products