cve/2021/CVE-2021-20085.md

### [CVE-2021-20085](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20085)
![](https://img.shields.io/static/v1?label=Product&message=backbone-query-parameters&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Prototype%20Pollution&color=brighgreen)

### Description

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in backbone-query-parameters 0.4.0 allows a malicious user to inject properties into Object.prototype.

### POC

#### Reference
- https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/backbone-qp.md

#### Github
- https://github.com/BlackFan/client-side-prototype-pollution
- https://github.com/retr0-13/client-side-prototype-pollution