Unrestricted file upload vulnerability in modules/gallery/models/item.php in Menalto Gallery before 3.0 and beta allows remote authenticated users with upload permissions to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in an unspecified directory.

Gallery before 1.5.9, and 2.x before 2.2.6, does not properly handle ZIP archives containing symbolic links, which allows remote authenticated users to conduct directory traversal attacks and read arbitrary files via vectors related to the archive upload (aka zip upload) functionality.

Cross-site scripting (XSS) vulnerability in Gallery 2.x before 2.2.6 allows remote attackers to inject arbitrary web script or HTML via a crafted Flash animation, related to the ability of the animation to "interact with the embedding page."

Gallery before 1.5.9, and 2.x before 2.2.6, does not set the secure flag for the session cookie in an https session, which can cause the cookie to be sent in http requests and make it easier for remote attackers to capture this cookie.

Menalto Gallery before 2.2.5 does not enforce permissions for non-album items that have been protected by a password, which might allow remote attackers to bypass intended access restrictions.