src/utils/security.test.ts

@@ -10,6 +10,7 @@ describe('Security Utils', () => {
       expect(sanitizeInput('foo & bar')).toBe('foo & bar');
       expect(sanitizeInput('"quotes"')).toBe('"quotes"');
       expect(sanitizeInput("'single quotes'")).toBe(''single quotes'');
+      expect(sanitizeInput('`backticks`')).toBe('`backticks`');
       expect(sanitizeInput('>')).toBe('>');
     });
 
@@ -25,6 +26,12 @@ describe('Security Utils', () => {
       const expected = '<script>alert("XSS")</script>';
       expect(sanitizeInput(input)).toBe(expected);
     });
+
+    it('handles mixed content with backticks', () => {
+      const input = '`alert(1)`';
+      const expected = '`alert(1)`';
+      expect(sanitizeInput(input)).toBe(expected);
+    });
   });
 
   describe('isValidEmail', () => {

src/utils/security.ts

@@ -14,7 +14,8 @@ export function sanitizeInput(input: string): string {
     .replace(/</g, "&lt;")
     .replace(/>/g, "&gt;")
     .replace(/"/g, "&quot;")
-    .replace(/'/g, "&#039;");
+    .replace(/'/g, "&#039;")
+    .replace(/`/g, "&#96;");
 }
 
 // Common disposable email providers and invalid domains