CVE-2026-19513— Gravity Forms 任意文件上传漏洞
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。
Gravity Forms是Gravity Forms公司的一款创建表单的CMS组件。 Gravity Forms 3.0.2及之前版本存在任意文件上传漏洞，该漏洞源于对多文件上传分块状态验证不足，攻击者可上传任意文件至临时上传目录，可能导致远程代码执行。
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Gravity Forms | Gravity Forms | ≤ 3.0.2 |
affected |
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一、 漏洞 CVE-2026-19513 基础信息
漏洞信息
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Vulnerability Title
Gravity Forms <= 3.0.2 - Unauthenticated Arbitrary File Upload via State/Chunk Hash Confusion
来源: CVE Program / CVE List V5
Vulnerability Description
The Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 3.0.2. This is due to insufficient validation of multi-file upload chunk state in the `GFAsyncUpload::upload()` function, where public form state URL hashes can be reused as chunk continuation hashes and attacker-controlled temporary filenames are accepted before sanitization. This makes it possible for unauthenticated attackers, when a public form contains a File Upload field with Multiple Files enabled, to upload a valid PNG/PDF polyglot to an attacker-selected public `.php` or `.html` filename in the Gravity Forms temporary upload directory. This can lead to remote code execution on WordPress systems that use NGINX or other non `.htaccess` respecting web servers. NOTE: During installation and activation, the Gravity Forms plugin places a `.htaccess` file in this directory, which prevents this vulnerability from being exploited despite the PHP file being written to the temporary upload directory. In these cases where PHP execution is blocked, attacker-written HTML can result in stored same-origin cross-site scripting if a victim visits the generated file URL.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
来源: CVE Program / CVE List V5
Vulnerability Title
Gravity Forms 任意文件上传漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Gravity Forms是Gravity Forms公司的一款创建表单的CMS组件。 Gravity Forms 3.0.2及之前版本存在任意文件上传漏洞，该漏洞源于对多文件上传分块状态验证不足，攻击者可上传任意文件至临时上传目录，可能导致远程代码执行。
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 |
|---|---|---|---|---|
| Gravity Forms | Gravity Forms | 0 ~ 3.0.2 | - |
|
二、漏洞 CVE-2026-19513 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-19513 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-19513
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