The core Upload module in Drupal 4.7.x before 4.7.8 and 5.x before 5.3 places the .html extension on a whitelist, which allows remote attackers to conduct cross-site scripting (XSS) attacks by uploading .html files.
| Software | From | Fixed in |
|---|---|---|
drupal / drupal
|
4.7.0 | 4.7.8 |
drupal / drupal
|
5.0 | 5.3 |