plugins/event_tracer/event_list.php in PhpWebGallery 1.7.2 and earlier allows remote authenticated administrators to execute arbitrary PHP code via PHP sequences in the sort parameter, which is processed by create_function.

Cross-site scripting (XSS) vulnerability in comments.php in PhpWebGallery 1.5.2 and earlier, and possibly 1.6.0, allows remote attackers to inject arbitrary web script or HTML via the keyword parameter.

Multiple SQL injection vulnerabilities in PhpWebGallery 1.5.1 and earlier allow remote attackers to execute arbitrary SQL commands via the (1) since, (2) sort_by, and (3) items_number parameters to comments.php, (4) the search parameter to category.php, and (5) image_id parameter to picture.php. NOTE: it was later reported that the comments.php/sort_by vector also affects 1.7.2 and earlier.