LOW CVSS 3.3
Published: 2025-06-25

CVE-2025-6648

pdf-xchange pdf-tools Security Advisory (CVE-2025-6648)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-6648 impacting pdf-xchange pdf-tools. Evaluated with CVSS Base Score of 3.3 (LOW).

Original NVD Description

Source: NIST NVD
PDF-XChange Editor U3D File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of PDF-XChange Editor. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of U3D files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-26671.

📊 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
None (PR:N)
Unauthenticated execution
User Interaction
Required (UI:R)
User must click or open resource
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
Low (C:L)
Partial information leakage
Integrity
None (I:N)
No system modification impact
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product pdf-xchange / pdf-tools
Affected Versions 10.5.2.395
Weakness Enumeration CWE-125

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-2025-6648 impacting pdf-xchange pdf-tools.

⚡ Nuclei Detection Template (YAML) cve-2025-6648.yaml
id: cve-2025-6648

info:
  name: pdf-xchange pdf-tools - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: low
  description: |
    Automated signature & scanner for CVE-2025-6648 affecting pdf-xchange pdf-tools.
    Evaluation: PDF-XChange Editor U3D File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose se...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-6648
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    cvss-score: 3.3
    cve-id: CVE-2025-6648
    cwe-id: CWE-125
  tags: cve,cve-2025-6648,pdf-xchange,pdf-tools,low

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "pdf-tools"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-6648.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-6648
# Target: pdf-xchange pdf-tools | CVSS: 3.3 (LOW)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-6648 (pdf-xchange pdf-tools)...")
    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 pdf-xchange pdf-tools scope (10.5.2.395).")
        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-2025-6648.sh
# Recommended Remediation & Patching Commands for CVE-2025-6648
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install pdf-tools 2>/dev/null || \
sudo dnf upgrade pdf-tools 2>/dev/null || \
sudo yum update pdf-tools

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

# 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-2025-6648 in pdf-xchange pdf-tools?

Review vendor-specific security notices and update pdf-xchange pdf-tools 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-2025-6648?

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-2025-6648?

CVE-2025-6648 is classified with a CVSS 3.1 Base Score of 3.3 (LOW). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
3.3
LOW SEVERITY
CVE ID CVE-2025-6648
Weakness CWE-125
Vendor pdf-xchange
Product pdf-tools
Published 2025-06-25
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N