SeedDMS 5.1.11 - out.GroupMgr.php Cross-Site Scripting

# Exploit Title: [Persistent Cross-Site Scripting or Stored XSS in out/out.GroupMgr.php in SeedDMS before 5.1.11]
# Google Dork: [NA]
# Date: [17-June-2019]
# Exploit Author: [Nimit Jain](https://www.linkedin.com/in/nimitiitk)(https://secfolks.blogspot.com)
# Vendor Homepage: [https://www.seeddms.org]
# Software Link: [https://sourceforge.net/projects/seeddms/files/]
# Version: [< 5.1.11] (REQUIRED)
# Tested on: [NA]
# CVE : [CVE-2019-12801]

Proof-of-Concept:

Step 1: Login to the application and go to Groups Management in Admin tools.
Step 2: Now create a new group as hello<script>alert("group")</script>
Step 3: Now save it click on choose group to execute the javascript inserted above.