MEDIUM CVSS 5.4
Published: 2025-07-22

CVE-2025-51479

onyx onyx Security Advisory (CVE-2025-51479)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-51479 impacting onyx onyx. Evaluated with CVSS Base Score of 5.4 (MEDIUM).

Original NVD Description

Source: NIST NVD
Authorization bypass in update_user_group in onyx-dot-app Onyx Enterprise Edition 0.27.0 allows remote authenticated attackers to modify arbitrary user groups via crafted PATCH requests to the /api/manage/admin/user-group/id endpoint, bypassing intended curator-group assignment checks.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
Low (PR:L)
Standard user access required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
Low (C:L)
Partial information leakage
Integrity
Low (I:L)
Partial data modification possible
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product onyx / onyx
Affected Versions 0.27.0
Weakness Enumeration CWE-639

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2025-51479 impacting onyx onyx.

⚡ Nuclei Detection Template (YAML) cve-2025-51479.yaml
id: cve-2025-51479

info:
  name: onyx onyx - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2025-51479 affecting onyx onyx.
    Evaluation: Authorization bypass in update_user_group in onyx-dot-app Onyx Enterprise Edition 0.27.0 allows remote authenticated attackers to modify arbitrary use...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-51479
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 5.4
    cve-id: CVE-2025-51479
    cwe-id: CWE-639
  tags: cve,cve-2025-51479,onyx,onyx,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "onyx"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-51479.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-51479
# Target: onyx onyx | CVSS: 5.4 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-51479 (onyx onyx)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against onyx onyx scope (0.27.0).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2025-51479.sh
# Recommended Remediation & Patching Commands for CVE-2025-51479
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install onyx 2>/dev/null || \
sudo dnf upgrade onyx 2>/dev/null || \
sudo yum update onyx

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i onyx 2>/dev/null || rpm -qa | grep -i onyx

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

🔗 Verified Technical References

Authorities
  • No records filed in this category.
Distributions
  • No records filed in this category.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2025-51479 in onyx onyx?

Review vendor-specific security notices and update onyx onyx packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2025-51479?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2025-51479?

CVE-2025-51479 is classified with a CVSS 3.1 Base Score of 5.4 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
5.4
MEDIUM SEVERITY
CVE ID CVE-2025-51479
Weakness CWE-639
Vendor onyx
Product onyx
Published 2025-07-22
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N