| Issues | Reason |
| Encryption/Decryption | Time Consuming |
| Brute Force Attack | Because of open body |
| Resolve the external entity | Because XML 1.0/1.1 Stand |
| Implicit trust of internal DTD | Declaring the general entity notation |
| Configuration catalogs | Entity resolve catalogs |
| Trust the external schema | External schema definition |
| UTF-8/UTF-16 | Malformed |
| Sure the trust entity | Import and include construct |