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CVE-2026-3173— Meta Field Block <= 1.5.1 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary User Meta Exposure

Quick assessment

Affected
mr2p Meta Field Block – Display custom fields in the Block Editor without coding
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 Meta Field Block 1.5.1及之前版本存在安全漏洞，该漏洞源于不安全的直接对象引用，可能导致经过身份验证的攻击者读取任意对象元数据。

CVSS 6.5 · Medium EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
mr2p Meta Field Block – Display custom fields in the Block Editor without coding ≤ 1.5.1 affected
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I. Basic Information for CVE-2026-3173

Vulnerability Information
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Vulnerability Title
Meta Field Block <= 1.5.1 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary User Meta Exposure
Source: CVE Program / CVE List V5
Vulnerability Description
The Meta Field Block plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.5.1. This is due to the plugin allowing users to specify arbitrary object IDs and object types via block attributes without validating whether the authenticated user has permission to access the requested object's metadata. This makes it possible for authenticated attackers, with Contributor-level access and above, to read arbitrary user meta, post meta, and term meta data from any object in the database. On sites using plugins that store sensitive data in meta fields (e.g., WooCommerce billing/shipping information), this could lead to the exposure of Personally Identifiable Information (PII) including names, email addresses, phone numbers, and physical addresses.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Meta Field Block 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 Meta Field Block 1.5.1及之前版本存在安全漏洞，该漏洞源于不安全的直接对象引用，可能导致经过身份验证的攻击者读取任意对象元数据。
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
mr2p Meta Field Block – Display custom fields in the Block Editor without coding 0 ~ 1.5.1 -

II. Public POCs for CVE-2026-3173

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III. Intelligence Information for CVE-2026-3173

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News Coverage for CVE-2026-3173 (1)

Other References for CVE-2026-3173 (2)

IV. Related Vulnerabilities

Same product: Meta Field Block – Display custom fields in the Block Editor without coding
Same vendor: mr2p
Same weakness: CWE-639

V. Comments for CVE-2026-3173

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