HIGH CVSS 8.3
Published: 2026-01-29

CVE-2025-62514

parsec.cloud parsec Security Advisory (CVE-2025-62514)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2025-62514 impacting parsec.cloud parsec. Evaluated with CVSS Base Score of 8.3 (HIGH).

Original NVD Description

Source: NIST NVD
Parsec is a cloud-based application for cryptographically secure file sharing. In versions on the 3.x branch prior to 3.6.0, `libparsec_crypto`, a component of the Parsec application, does not check for weak order point of Curve25519 when compiled with its RustCrypto backend. In practice this means an attacker in a man-in-the-middle position would be able to provide weak order points to both parties in the Diffie-Hellman exchange, resulting in a high probability to for both parties to obtain the same shared key (hence leading to a successful SAS code exchange, misleading both parties into thinking no MITM has occurred) which is also known by the attacker. Note only Parsec web is impacted (as Parsec desktop uses `libparsec_crypto` with the libsodium backend). Version 3.6.0 of Parsec patches the issue.

📊 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
High (C:H)
Total information disclosure
Integrity
High (I:H)
Total modification of target system
Availability
Low (A:L)
Partial service performance degradation

🎯 Affected Versions Matrix

Affected Product parsec.cloud / parsec
Affected Versions *
Weakness Enumeration CWE-327

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-2025-62514 impacting parsec.cloud parsec.

⚡ Nuclei Detection Template (YAML) cve-2025-62514.yaml
id: cve-2025-62514

info:
  name: parsec.cloud parsec - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2025-62514 affecting parsec.cloud parsec.
    Evaluation: Parsec is a cloud-based application for cryptographically secure file sharing. In versions on the 3.x branch prior to 3.6.0, `libparsec_crypto`, a com...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2025-62514
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
    cvss-score: 8.3
    cve-id: CVE-2025-62514
    cwe-id: CWE-327
  tags: cve,cve-2025-62514,parsec.cloud,parsec,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "parsec"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2025-62514.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2025-62514
# Target: parsec.cloud parsec | CVSS: 8.3 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2025-62514 (parsec.cloud parsec)...")
    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 parsec.cloud parsec 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-2025-62514.sh
# Recommended Remediation & Patching Commands for CVE-2025-62514
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install parsec 2>/dev/null || \
sudo dnf upgrade parsec 2>/dev/null || \
sudo yum update parsec

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

# 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-2025-62514 in parsec.cloud parsec?

Review vendor-specific security notices and update parsec.cloud parsec 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-2025-62514?

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-2025-62514?

CVE-2025-62514 is classified with a CVSS 3.1 Base Score of 8.3 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
8.3
HIGH SEVERITY
CVE ID CVE-2025-62514
Weakness CWE-327
Vendor parsec.cloud
Product parsec
Published 2026-01-29
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L