CVE-2005-3310

Interpretation conflict in phpBB 2.0.17, with remote avatars and avatar
uploading enabled, allows remote authenticated users to inject arbitrary
web script or HTML via an HTML file with a GIF or JPEG file extension,
which causes the HTML to be executed by a victim who views the file in
Internet Explorer, which renders malformed image types as HTML, enabling
cross-site scripting (XSS) attacks. NOTE: it could be argued that this
vulnerability is due to a design flaw in Internet Explorer (CVE-2005-3312)
and the proper fix should be in that browser; if so, then this should not
be treated as a vulnerability in phpBB.