Loco Translate, CVE-2026-1921

CVE, Research URL: CVE-2026-1921
Home page URL: Security reports for Loco Translate
Application: Loco Translate
Published on: May 05, 2026
Research Description: The Loco Translate plugin for WordPress is vulnerable to Path Traversal in all versions up to, and including, 2.8.2 via the `fsReference` AJAX route. This is due to the `findSourceFile()` method normalizing user-supplied `ref` paths containing `../` directory traversal sequences without validating that the resolved path remains within the intended bundle or content directory. This makes it possible for authenticated attackers, with Translator-level access and above (custom `loco_admin` capability required, granted to the `translator` role and administrators by default), to read arbitrary `.php`, `.js`, `.json`, and `.twig` files from the server filesystem outside the intended translation directory. Files named wp-config.php are excluded.
Affected versions: max 2.8.3.
Status: vulnerable