CVE-2026-103039— Gravity Forms 3.1.2 未认证 PHP 对象注入漏洞
一分钟漏洞结论
影响对象
Gravity Forms Gravity Forms
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
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 的 Gravity Forms 插件在所有 3.1.2 及更早版本中存在 PHP 对象注入漏洞。该漏洞源于：当自定义字段（Post Custom Field）的输入类型为“列表（List）”时，GFFormsModel::create_post() 方法将用户提交的数据直接传递给 WordPress 全局的、未加限制的 maybe_unserialize() 函数，而非插件自身在 3.1.1 版本中引入的加固版本 GFCommon::maybe_unserialize()。后者通过设置 allo
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一、 漏洞 CVE-2026-103039 基础信息
漏洞信息
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Vulnerability Title
Gravity Forms <= 3.1.2 - Unauthenticated PHP Object Injection via Post Custom Field
来源: CVE Program / CVE List V5
Vulnerability Description
The Gravity Forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.2 via a Post Custom Field whose input type is List. This is due to GFFormsModel::create_post() passing the submitted value to WordPress' unrestricted global maybe_unserialize() rather than the plugin's own hardened GFCommon::maybe_unserialize(), which was added in 3.1.1 and passes allowed_classes => false precisely to prevent object instantiation. Where the field has a content template enabled, the submitted row reaches that call verbatim. This makes it possible for unauthenticated attackers to inject a PHP object into post meta. No PHP Object Injection gadget chain is present in the plugin itself; however, if a gadget chain is present via an additional plugin or theme, it could allow the attacker to perform actions such as remote code execution. Where the custom field is mapped to the protected _wp_page_template meta key, WordPress itself supplies the chain: validate_file() accepts non-scalars, WP_Theme::__toString() then resolves an attacker-controlled path, and on hosts with a readable PEAR install and register_argc_argv enabled this yields remote code execution.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Gravity Forms | Gravity Forms | 0 ~ 3.1.2 | - |
|
二、漏洞 CVE-2026-103039 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-103039 其他参考 (2)
同批安全公告 · Gravity Forms · 2026-10-30 · 共 3 条
| CVE-2026-90437 | 7.2 HIGH | Gravity Forms 3.1.1 存储型跨站脚本漏洞 |
| CVE-2026-97645 | 7.2 HIGH | Gravity Forms 3.1.2 列表字段未认证存储型 XSS 漏洞 |