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CVE-2026-3576— WordPress Planyo online reservation system 输入验证错误漏洞

一分钟漏洞结论

影响对象
xtreeme Planyo online reservation system
利用判断
存在公开或 AI PoC，应优先验证
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

WordPress Planyo online reservation system是WordPress基金会的一款在线预约系统。 WordPress Planyo online reservation system 3.0及之前版本存在输入验证错误漏洞，该漏洞源于ulap.php文件中的send_http_post()函数未能验证URL协议/方案，可能导致未经身份验证的攻击者通过file:// URL读取服务器任意本地文件。

CVSS 7.2 · High EPSS 8.81% · P95

影响版本矩阵 1

厂商产品 版本范围状态
xtreeme Planyo online reservation system ≤ 3.0 affected
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一、 漏洞 CVE-2026-3576 基础信息

漏洞信息
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Vulnerability Title
Planyo online reservation system <= 3.0 - Unauthenticated Server-Side Request Forgery via 'ulap_url' Parameter
来源: CVE Program / CVE List V5
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
WordPress Planyo online reservation system 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
WordPress Planyo online reservation system是WordPress基金会的一款在线预约系统。 WordPress Planyo online reservation system 3.0及之前版本存在输入验证错误漏洞，该漏洞源于ulap.php文件中的send_http_post()函数未能验证URL协议/方案，可能导致未经身份验证的攻击者通过file:// URL读取服务器任意本地文件。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
xtreeme Planyo online reservation system 0 ~ 3.0 -

二、漏洞 CVE-2026-3576 的公开POC

# POC 描述 源链接 神龙链接
1 The Planyo Online Reservation System plugin for WordPress through 3.0 ships ulap.php, an AJAX proxy that is directly reachable without WordPress bootstrapping or authentication. The send_http_post() function validates the host of the supplied URL against an allowlist that includes localhost, but never validates the URL scheme, so a file://localhost/ URL passes the host check and is handed to curl_init() or fopen(). Both support the file:// wrapper, so the contents of arbitrary local files are returned in the response. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3576.yaml POC详情
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三、漏洞 CVE-2026-3576 的情报信息

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CVE-2026-3576 补丁与修复 (3)

CVE-2026-3576 新闻报道 (1)

CVE-2026-3576 厂商页面 (1)

CVE-2026-3576 其他参考 (1)

IV. Related Vulnerabilities

Same product: Planyo online reservation system
Same vendor: xtreeme
Same weakness: CWE-20

V. Comments for CVE-2026-3576

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