HIGH CVSS 8.2
Published: 2017-03-03

CVE-2015-8813

umbraco umbraco Security Advisory (CVE-2015-8813)
↗ Official NIST NVD Record
Seeking technical exploit breakdowns or verified PoC code for CVE-2015-8813?
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2015-8813 impacting umbraco umbraco. Evaluated with CVSS Base Score of 8.2 (HIGH).

Original NVD Description

Source: NIST NVD
The Page_Load function in Umbraco.Web/umbraco.presentation/umbraco/dashboard/FeedProxy.aspx.cs in Umbraco before 7.4.0 allows remote attackers to conduct server-side request forgery (SSRF) attacks via the url parameter.

📊 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
None (PR:N)
Unauthenticated execution
User Interaction
Required (UI:R)
User must click or open resource
Scope
Changed (S:C)
Impacts components beyond caller authority
Confidentiality
Low (C:L)
Partial information leakage
Integrity
High (I:H)
Total modification of target system
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product umbraco / umbraco
Affected Versions *
Weakness Enumeration CWE-918

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-2015-8813 impacting umbraco umbraco.

⚡ Nuclei Detection Template (YAML) cve-2015-8813.yaml
id: cve-2015-8813

info:
  name: umbraco umbraco - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2015-8813 affecting umbraco umbraco.
    Evaluation: The Page_Load function in Umbraco.Web/umbraco.presentation/umbraco/dashboard/FeedProxy.aspx.cs in Umbraco before 7.4.0 allows remote attackers to cond...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2015-8813
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
    cvss-score: 8.2
    cve-id: CVE-2015-8813
    cwe-id: CWE-918
  tags: cve,cve-2015-8813,umbraco,umbraco,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "umbraco"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2015-8813.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2015-8813
# Target: umbraco umbraco | CVSS: 8.2 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2015-8813 (umbraco umbraco)...")
    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 umbraco umbraco scope (*).")
        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-2015-8813.sh
# Recommended Remediation & Patching Commands for CVE-2015-8813
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install umbraco 2>/dev/null || \
sudo dnf upgrade umbraco 2>/dev/null || \
sudo yum update umbraco

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

# 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.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2015-8813 in umbraco umbraco?

Review vendor-specific security notices and update umbraco umbraco 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-2015-8813?

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-2015-8813?

CVE-2015-8813 is classified with a CVSS 3.1 Base Score of 8.2 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
8.2
HIGH SEVERITY
CVE ID CVE-2015-8813
Weakness CWE-918
Vendor umbraco
Product umbraco
Published 2017-03-03
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N