Alphakgen

**Name of the Vulnerable Software and Affected Versions** phpBB version 2.0.17 **Description** The issue arises from an interpretation conflict when remote avatars and avatar uploading are enabled, allowing remote authenticated users to inject arbitrary web script or HTML via an HTML file with a GIF or JPEG file extension. This can lead to cross-site scripting (XSS) attacks when a victim views the file in Internet Explorer, which renders malformed image types as HTML. **Recommendations** For phpBB version 2.0.17, consider disabling remote avatar and avatar uploading features until a proper fix is applied to prevent the injection of arbitrary web script or HTML. As a temporary workaround, restrict access to avatar uploading to minimize the risk of exploitation.