Is Duplicator safe? Known vulnerabilities and latest version

The Duplicator WordPress plugin before 5.0.0 does not restrict its one-click upgrade routine to users allowed to install Duplicator WordPress plugin before 5.0.0, and additionally exposes the routine without authentication, allowing an administrator of a multisite child site who is not a network administrator to install and run arbitrary PHP in the network-wide shared Duplicator WordPress plugin before 5.0.0 directory.

The Duplicator and Duplicator Pro plugins for WordPress are vulnerable to PHP Object Injection in all versions up to, and including, 1.5.17 and 4.6.10, respectively, via deserialization of untrusted database content in DUPX_UpdateEngine::unserializeTest() during migration. This allows unauthenticated attackers to store a serialized object in public site content before an administrator builds a package and later performs a migration or import that runs database search-and-replace. Duplicator Free bundles a Requests 1.7 POP chain that permits attacker-selected callbacks, resulting in direct operating-system command execution. Duplicator Pro bundles an IndexList destructor gadget that permits deletion of an attacker-selected existing file when its containing directory is writable by the installer PHP process; deletion of wp-config.php can expose the setup wizard and lead to site takeover and code execution if the attacker reaches it first and supplies a reachable database they control. The package must be created after the carrier is stored, and a later administrator migration action is required.

The Duplicator plugin for WordPress is vulnerable to information exposure in all versions up to, and including, 1.5.9. This makes it possible for unauthenticated attackers to obtain the full path to instances, which they may be able to use in combination with other vulnerabilities or to simplify reconnaissance work. On its own, this information is of very limited use.

Cross-Site Request Forgery (CSRF) vulnerability in Duplicator Duplicator – WordPress Migration & Backup Plugin.This issue affects Duplicator – WordPress Migration & Backup Plugin: from n/a through 1.5.7.

The Duplicator WordPress plugin before 1.3.0 does not properly escape values when its installer script replaces values in WordPress configuration files. If this installer script is left on the site after use, it could be use to run arbitrary code on the server.

The Duplicator WordPress plugin before 1.5.7.1, Duplicator Pro WordPress plugin before 4.5.14.2 does not disallow listing the `backups-dup-lite/tmp` directory (or the `backups-dup-pro/tmp` directory in the Pro version), which temporarily stores files containing sensitive data. When directory listing is enabled in the web server, this allows unauthenticated attackers to discover and access these sensitive files, which include a full database dump and a zip archive of the site.

The Duplicator WordPress plugin before 1.4.7 discloses the url of the a backup to unauthenticated visitors accessing the main installer endpoint of the plugin, if the installer script has been run once by an administrator, allowing download of the full site backup without authenticating.

The Duplicator WordPress plugin before 1.4.7 does not authenticate or authorize visitors before displaying information about the system such as server software, php version and full file system path to the site.