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CVE-2026-5436— MW WP Form <= 5.1.1 - Unauthenticated Arbitrary File Move via regenerate_upload_file_keys

Quick assessment

Affected
inc2734 MW WP Form
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin MW WP Form 5.1.1及之前版本存在路径遍历漏洞，该漏洞源于对generate_user_file_dirpath函数中$name参数验证不足，可能导致未经验证的攻击者移动服务器上的任意文件，进而引发远程代

CVSS 8.1 · High EPSS 0.92% · P60
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I. Basic Information for CVE-2026-5436

Vulnerability Information
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Vulnerability Title
MW WP Form <= 5.1.1 - Unauthenticated Arbitrary File Move via regenerate_upload_file_keys
Source: CVE Program / CVE List V5
Vulnerability Description
The MW WP Form plugin for WordPress is vulnerable to Arbitrary File Move/Read in all versions up to and including 5.1.1. This is due to insufficient validation of the $name parameter (upload field key) passed to the generate_user_file_dirpath() function, which uses WordPress's path_join() — a function that returns absolute paths unchanged, discarding the intended base directory. The attacker-controlled key is injected via the mwf_upload_files[] POST parameter, which is loaded into the plugin's Data model via _set_request_valiables(). During form processing, regenerate_upload_file_keys() iterates over these keys and calls generate_user_filepath() with the attacker-supplied key as the $name argument — the key survives validation because the targeted file (e.g., wp-config.php) genuinely exists at the absolute path. The _get_attachments() method then re-reads the same surviving keys and passes the resolved file path to move_temp_file_to_upload_dir(), which calls rename() to move the file into the uploads folder. This makes it possible for unauthenticated attackers to move arbitrary files on the server, which can easily lead to remote code execution when the right file is moved (such as wp-config.php). The vulnerability is only exploitable if a file upload field is added to the form and the “Saving inquiry data in database” option is enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin MW WP Form 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin MW WP Form 5.1.1及之前版本存在路径遍历漏洞，该漏洞源于对generate_user_file_dirpath函数中$name参数验证不足，可能导致未经验证的攻击者移动服务器上的任意文件，进而引发远程代
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
inc2734 MW WP Form 0 ~ 5.1.1 -

II. Public POCs for CVE-2026-5436

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9239 chars
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III. Intelligence Information for CVE-2026-5436

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Patches & Fixes for CVE-2026-5436 (1)

IV. Related Vulnerabilities

Same product: MW WP Form
Same vendor: inc2734
Same weakness: CWE-22

V. Comments for CVE-2026-5436

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