CVE-2026-3576

EIP tracks 2 public exploits for CVE-2026-3576. PoCs published by incogbyte, anirbala98.

AI-analyzed exploit summary Unauthenticated Server-Side Request Forgery (SSRF) in Planyo Online Reservation System <= 3.0 via the `ulap_url` parameter in `ulap.php`. The exploit bypasses the host allow-list by using 'localhost' to force the server to make arbitrary HTTP requests and reflect responses, enabling internal port scanning and data exfiltration.

The Planyo Online Reservation System plugin for WordPress is vulnerable to Server-Side Request Forgery leading to Local File Inclusion in all versions up to, and including, 3.0. The ulap.php file acts as an AJAX proxy and is directly accessible without WordPress bootstrapping or any authentication. The send_http_post() function validates the host of the provided URL against an allowlist that includes 'localhost', but critically fails to validate the URL scheme/protocol. This makes it possible for unauthenticated attackers to supply a file:// URL (e.g., file://localhost/etc/passwd) which bypasses the host allowlist check because parse_url() returns 'localhost' as the host. The URL is then passed to curl_init() or fopen(), both of which support the file:// protocol, allowing the attacker to read arbitrary local files on the server and have their contents returned in the HTTP response. This can lead to disclosure of sensitive files such as /etc/passwd, wp-config.php (containing database credentials and authentication keys), and other server-side files.