The management panel in Piwigo 2.9.3 has stored XSS via the name parameter in a /admin.php?page=photo-${photo_number} request. CSRF exploitation, related to CVE-2017-10681, may be possible.
Piwigo before 2.9.3 has SQL injection in admin/tags.php in the administration panel, via the tags array parameter in an admin.php?page=tags request. The attacker must be an administrator.
The List Users API of Piwigo 2.9.2 is vulnerable to SQL Injection via the /admin/user_list_backend.php sSortDir_0 parameter. An attacker can exploit this to gain access to the data in a connected MySQL database.
The Configuration component of Piwigo 2.9.2 is vulnerable to SQL Injection via the admin/configuration.php order_by array parameter. An attacker can exploit this to gain access to the data in a connected MySQL database.
The Batch Manager component of Piwigo 2.9.2 is vulnerable to SQL Injection via the admin/batch_manager_unit.php element_ids parameter in unit mode. An attacker can exploit this to gain access to the data in a connected MySQL database.
The Batch Manager component of Piwigo 2.9.2 is vulnerable to Persistent Cross Site Scripting via tags-* array parameters in an admin.php?page=batch_manager&mode=unit request. An attacker can exploit this to hijack a client's browser along with the data stored in it.
The Configuration component of Piwigo 2.9.2 is vulnerable to Persistent Cross Site Scripting via the gallery_title parameter in an admin.php?page=configuration§ion=main request. An attacker can exploit this to hijack a client's browser along with the data stored in it.
Piwigo 2.9.2 is vulnerable to Cross-Site Request Forgery via /admin.php?page=configuration§ion=main or /admin.php?page=batch_manager&mode=unit. An attacker can exploit this to coerce an admin user into performing unintended actions.