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CVE-2026-5809— wpForo Forum <= 3.0.2 - Authenticated (Subscriber+) Arbitrary File Deletion via 'data[body][fileurl]' Parameter

Quick assessment

Affected
tomdever wpForo Forum
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.

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 wpForo Forum 3.0.2及之前版本存在安全漏洞，该漏洞源于topic_add和topic_edit操作处理程序接受任意用户提供的数据数组并存储为postmeta，且未限制哪些字段可包含数组值，可能导致经过

CVSS 7.1 · High EPSS 0.63% · P48

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2026-5809

Vulnerability Information
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Vulnerability Title
wpForo Forum <= 3.0.2 - Authenticated (Subscriber+) Arbitrary File Deletion via 'data[body][fileurl]' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The wpForo Forum plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to and including 3.0.2. This is due to a two-step logic flaw: the topic_add() and topic_edit() action handlers accept arbitrary user-supplied data[*] arrays from $_REQUEST and store them as postmeta without restricting which fields may contain array values. Because 'body' is included in the allowed topic fields list, an attacker can supply data[body][fileurl] with an arbitrary file path (e.g., wp-config.php or an absolute server path). This poisoned fileurl is persisted to the plugin's custom postmeta database table. Subsequently, when the attacker submits wpftcf_delete[]=body on a topic_edit request, the add_file() method retrieves the stored postmeta record, extracts the attacker-controlled fileurl, passes it through wpforo_fix_upload_dir() which only rewrites legitimate wpforo upload paths and returns all other paths unchanged, and then calls wp_delete_file() on the unvalidated path. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files writable by the PHP process on the server, including critical files such as wp-config.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin wpForo Forum 安全漏洞
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 wpForo Forum 3.0.2及之前版本存在安全漏洞，该漏洞源于topic_add和topic_edit操作处理程序接受任意用户提供的数据数组并存储为postmeta，且未限制哪些字段可包含数组值，可能导致经过
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
tomdever wpForo Forum 0 ~ 3.0.2 -

II. Public POCs for CVE-2026-5809

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III. Intelligence Information for CVE-2026-5809

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IV. Related Vulnerabilities

Same product: wpForo Forum
Same vendor: tomdever
Same weakness: CWE-73

V. Comments for CVE-2026-5809

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