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Vulnerability · Published Jul 11, 2026 · Assigned by Wordfence

CVE-2026-3576Planyo online reservation system <= 3.0 - Unauthenticated Server-Side Request Forgery via 'ulap_url' Parameter

High 7.2

In plain English

A high-severity improper input validation in Planyo online reservation system from xtreeme. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.8% (higher than 95% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code.

Severity (CVSS 3.1)7.2High
Exploit odds (30 days)8.8%top 4.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling3Metasploit, Nuclei, Public PoC

Official description

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.

Affected products (as reported)

VendorProductVersions
xtreeme Planyo online reservation system 0 – through 3.0

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References