UpdraftPlus: WP Backup & Migration Plugin

The UpdraftPlus plugin for WordPress is vulnerable to Sensitive Information Exposure in versions 1.23.8 through 1.26.7. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract sensitive user or configuration data.

The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to 1.26.7. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to perform an unauthorized action via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 1.26.4 (free) and versions up to 2.26.5 (premium) via the UpdraftPlus_Remote_Communications_V2::wp_loaded function. This is due to insufficient validation of the remote communications message format, where signature verification can be bypassed and unchecked decryption return values collapse to a predictable all-zero encryption key. This makes it possible for unauthenticated attackers to forge arbitrary RPC commands and run them as the connected administrator, such as uploading and activating a malicious plugin, which ultimately leads to remote code execution.

The UpdraftPlus: WP Backup & Migration Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the showdata and initiate_restore parameters in all versions up to, and including, 1.24.12 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick an admin user into performing an action such as clicking on a link.