CVE-2026-3576 Planyo online reservation system <= 3.0 - Unauthenticated Server-Side Request Forgery via 'ulap_url' Parameter
Unauthenticated attackers can exploit SSRF to read arbitrary local files, including sensitive configuration files, via the ulap_url parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3576?
CVE-2026-3576 is a high-severity server-side request forgery vulnerability in xtreeme Planyo online reservation system, published on 11 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-20
Which versions are affected by CVE-2026-3576?
How do I fix CVE-2026-3576?
No fix has been published for CVE-2026-3576 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-3576 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3576 exists.
Public exploit code: 1 Metasploit module, 1 Exploit-DB entry, 1 Nuclei template and 1 proofs of concept on GitHub.
Sources
Also known as GHSA-jjq9-3x6f-75pj.