CVE-2026-3576

Published: July 11, 2026•Last Modified: July 11, 2026

CVSS SCORE

7.2

HIGH

Vulnerability 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 & Versions

No configurations parsed from local entry.

Security Advisories & References

Mitigation & Remediation

Update the affected packages to a secure version. Refer to vendor security advisories.

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# HIGH - CVE-2026-3576 ## EFFECT 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 Unknown products ## LINKS - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/tags/2.7/ulap.php#L118) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/tags/2.7/ulap.php#L120) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/tags/2.7/ulap.php#L59) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/tags/2.7/ulap.php#L84) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/tags/2.7/ulap.php#L96) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/trunk/ulap.php#L118) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/trunk/ulap.php#L120) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/trunk/ulap.php#L59) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/trunk/ulap.php#L84) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/browser/planyo-online-reservation-system/trunk/ulap.php#L96) - [plugins.trac.wordpress.org](https://plugins.trac.wordpress.org/changeset?reponame=&old=3488647%40planyo-online-reservation-system&new=3488647%40planyo-online-reservation-system) - [www.wordfence.com](https://www.wordfence.com/threat-intel/vulnerabilities/id/5038d12a-e119-4ab7-aadc-69b765ae7027?source=cve) ## SOLUTION - Update the affected packages to a secure version. Refer to vendor security advisories.