Reported vulnerability
Planyo online reservation system <= 3.0 - Unauthenticated Server-Side Request Forgery via 'ulap_url' Parameter
Published 10 Jul 2026
Updated 11 Jul 2026
CVE-2026-3576
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Wordfence advisory
high · CVSS 7.2The 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.
Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Planyo online reservation system
- Software
- plugin · planyo-online-reservation-system
- Affected versions
- Start version unspecified, through 3.0
- Fix availability
- Fix available
- Fixed versions
- 3.1
Recommended action
Update to version 3.1, or a newer patched version
Further references (1)
Data sources and licences
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Read licence termsSource: Wordfence
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Get help with this issueQuestions about this vulnerability
Which versions of Planyo online reservation system are affected?
Wordfence lists these affected versions: Start version unspecified, through 3.0. Use the version checker above to compare your installed release with this report.
Is a fix available for Planyo online reservation system?
Wordfence reports a fix for this issue in Planyo online reservation system. It lists these fixed versions: 3.1. Back up your website and test the recommended update before applying it to your live site.
Where can I find my installed plugin version?
In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.
Does an affected version mean my website has been hacked?
An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.
Other reports for the same product
These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.