usercp_avatar.php in PHPBB 2.0.20, when avatar uploading is enabled, allows remote attackers to use the server as a web proxy by submitting a URL to the avatarurl parameter, which is then used in an HTTP GET request.
| Software | From | Fixed in |
|---|---|---|
| phpbb_group / phpbb | 2.0.20 | 2.0.20.x |