CVE-2026-12923
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk24th percentile — higher than 24% of all known CVEs
Summary
The Youtube Showcase plugin for WordPress up to version 4.0.3 is vulnerable to arbitrary PHP function call due to insufficient validation of the 'path' parameter in the emd_delete_file() AJAX handler. Authenticated attackers with Subscriber-level access or higher can invoke zero-argument functions like phpinfo or phpversion, leading to information disclosure.
Risk Assessment
The risk includes exposure of sensitive server environment details (e.g., PHP configuration, global variables) and potential further compromise depending on available PHP functions.
Recommendation
Immediately update the Youtube Showcase plugin to the latest version and add proper capability checks (current_user_can()) in the AJAX handler to restrict access to administrators only.
Original NVD description (English source)
The Youtube Showcase plugin for WordPress is vulnerable to Arbitrary Function Call in versions up to and including 4.0.3. This is due to insufficient validation of the 'path' parameter in the emd_delete_file() AJAX handler in includes/common-functions.php. The user-supplied value is passed through sanitize_text_field(), has its trailing '_PLUGIN_DIR' substring stripped, and is then invoked as a PHP function name with no arguments via `$sess_name()`. The handler is gated only by a nonce — no current_user_can() check is present — and the nonce is emitted on any front-end page that renders a form shortcode containing file fields. This makes it possible for authenticated attackers, with Subscriber-level access and above, to invoke arbitrary zero-argument PHP functions (such as phpinfo, phpversion, get_defined_vars, error_get_last), resulting in sensitive information disclosure and potential further compromise depending on the functions available in the environment.