cve/2021/CVE-2021-3539.md

### [CVE-2021-3539](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3539)
![](https://img.shields.io/static/v1?label=Product&message=EspoCRM&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=6.1.6%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%20Cross-site%20Scripting%20(XSS)&color=brightgreen)

### Description

EspoCRM 6.1.6 and prior suffers from a persistent (type II) cross-site scripting (XSS) vulnerability in processing user-supplied avatar images. This issue was fixed in version 6.1.7 of the product.

### POC

#### Reference
- https://www.rapid7.com/blog/post/2021/07/27/multiple-open-source-web-app-vulnerabilities-fixed/

#### Github
No PoCs found on GitHub currently.