Handlebars – Prototype Pollution Vulnerability On Versions Greater Than Or Equal To 3.0.0 And Less Than 3.0.7

< 1 min read

Impact area

Security

Severity

High

Affected element

ServiceNow

UI Script

Salesforce

Static Resource

Rule number #

SN-JSL-HANDLEBARS-BETWEEN-V2990-V307 (for ServiceNow)

SF-JSL-HANDLEBARS-BETWEEN-V2990-V307 (for Salesforce)

Impact #

This vulnerability is due to an incomplete fix for: Prototype Pollution refers to the ability to inject properties into existing JavaScript language construct prototypes, such as objects. When that happens, this leads to either denial of service by triggering JavaScript exceptions, or it tampers with the application source code to force the code path that the attacker injects, thereby leading to remote code execution.

Remediation

Update the Handlebars JS library to version 3.0.7, 4.1.2, 4.0.14 or higher.

Time to fix #

30 min

References #

This rule is linked to Common Weakness Enumeration CWE-79 Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’).

Updated on March 21, 2025
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