Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-19513— Gravity Forms <= 3.0.2 - Unauthenticated Arbitrary File Upload via State/Chunk Hash Confusion

Quick assessment

Affected
Gravity Forms Gravity Forms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 8.1 · High EPSS 0.50% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
Gravity Forms Gravity Forms ≤ 3.0.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-19513

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Gravity Forms <= 3.0.2 - Unauthenticated Arbitrary File Upload via State/Chunk Hash Confusion
Source: 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.
Source: 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
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Gravity Forms 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
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。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gravity Forms Gravity Forms 0 ~ 3.0.2 -

II. Public POCs for CVE-2026-19513

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-19513

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-19513 (1)

IV. Related Vulnerabilities

Same product: Gravity Forms
Same vendor: Gravity Forms
Same weakness: CWE-434

V. Comments for CVE-2026-19513

No comments yet

Leave a comment