cve/2021/CVE-2021-21337.md

### [CVE-2021-21337](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21337)
![](https://img.shields.io/static/v1?label=Product&message=Products.PluggableAuthService&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-601%20URL%20Redirection%20to%20Untrusted%20Site%20('Open%20Redirect')&color=brighgreen)

### Description

Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an open redirect vulnerability. A maliciously crafted link to the login form and login functionality could redirect the browser to a different website. The problem has been fixed in version 2.6.1. Depending on how you have installed Products.PluggableAuthService, you should change the buildout version pin to `2.6.1` and re-run the buildout, or if you used `pip` simply do `pip install "Products.PluggableAuthService>=2.6.1".

### POC

#### Reference
- http://packetstormsecurity.com/files/162911/Products.PluggableAuthService-2.6.0-Open-Redirect.html

#### Github
- https://github.com/ARPSyndicate/cvemon