Directory traversal vulnerability in install.php in Piwigo before 2.4.7 allows remote attackers to read and delete arbitrary files via a .. (dot dot) in the dl parameter.
Directory traversal vulnerability in upgrade.php in Piwigo before 2.3.4 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the language parameter.
Multiple cross-site scripting (XSS) vulnerabilities in admin.php in Piwigo before 2.3.4 allow remote attackers to inject arbitrary web script or HTML via the (1) section parameter in the configuration module, (2) installstatus parameter in the languages_new module, or (3) theme parameter in the theme module.