Fix security vulnerabilities

src/components/blog/MarkdownRenderer.tsx

@@ -1,4 +1,5 @@
 import ReactMarkdown from 'react-markdown';
+import rehypeSanitize from 'rehype-sanitize';
 import { cn } from '@/lib/utils';
 
 interface MarkdownRendererProps {
@@ -25,7 +26,10 @@ export function MarkdownRenderer({ content, className }: MarkdownRendererProps)
         className
       )}
     >
-      <ReactMarkdown>
+      <ReactMarkdown 
+        rehypePlugins={[rehypeSanitize]}
+        skipHtml={true}
+      >
         {content}
       </ReactMarkdown>
     </div>