LOW CVSS 2.8
Published: 2020-11-23

CVE-2020-15249

octobercms october Security Advisory (CVE-2020-15249)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2020-15249 impacting octobercms october. Evaluated with CVSS Base Score of 2.8 (LOW).

Original NVD Description

Source: NIST NVD
October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469, backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
Low (PR:L)
Standard user access required
User Interaction
Required (UI:R)
User must click or open resource
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
Low (I:L)
Partial data modification possible
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product octobercms / october
Affected Versions *
Weakness Enumeration CWE-79

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-2020-15249 impacting octobercms october.

⚡ Nuclei Detection Template (YAML) cve-2020-15249.yaml
id: cve-2020-15249

info:
  name: octobercms october - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: low
  description: |
    Automated signature & scanner for CVE-2020-15249 affecting octobercms october.
    Evaluation: October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1....
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2020-15249
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
    cvss-score: 2.8
    cve-id: CVE-2020-15249
    cwe-id: CWE-79
  tags: cve,cve-2020-15249,octobercms,october,low

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "october"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2020-15249.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2020-15249
# Target: octobercms october | CVSS: 2.8 (LOW)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2020-15249 (octobercms october)...")
    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 octobercms october 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-2020-15249.sh
# Recommended Remediation & Patching Commands for CVE-2020-15249
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install october 2>/dev/null || \
sudo dnf upgrade october 2>/dev/null || \
sudo yum update october

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

# 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-2020-15249 in octobercms october?

Review vendor-specific security notices and update octobercms october 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-2020-15249?

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-2020-15249?

CVE-2020-15249 is classified with a CVSS 3.1 Base Score of 2.8 (LOW). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
2.8
LOW SEVERITY
CVE ID CVE-2020-15249
Weakness CWE-79
Vendor octobercms
Product october
Published 2020-11-23
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N