CVE-2026-16618 ImproveSEO <= 2.0.11 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution

The Improve SEO WordPress plugin through 2.0.11 does not properly validate uploaded files, checking only the file content type while writing the file with the attacker-supplied extension into a publicly accessible directory, allowing unauthenticated users to upload executable PHP files and achiev...

CVE-2026-16618

The CVE concerns the WordPress plugin Improve SEO (version up to 2.0.11). The vulnerability arises from improper validation of uploaded files: the plugin checks only the file content type while saving the file with an attacker-supplied extension into a publicly accessible directory. This allows u...