cve/2020/CVE-2020-13998.md

### [CVE-2020-13998](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13998)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

** UNSUPPORTED WHEN ASSIGNED ** Citrix XenApp 6.5, when 2FA is enabled, allows a remote unauthenticated attacker to ascertain whether a user exists on the server, because the 2FA error page only occurs after a valid username is entered. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/stratosphereips/nist-cve-search-tool