CVE-2026-6252— Meta Field Block <= 1.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tagName' Block Attribute
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| mr2p | Meta Field Block – Display custom fields in the Block Editor without coding | ≤ 1.5.2 | affected |
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I. Basic Information for CVE-2026-6252
Vulnerability Information
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Vulnerability Title
Meta Field Block <= 1.5.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'tagName' Block Attribute
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Meta Field Block plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tagName' block attribute in all versions up to, and including, 1.5.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (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 ~ 1.5.2 | - |
II. Public POCs for CVE-2026-6252
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-79
- CVE-2021-47981
Quick.CMS 6.7 Cross-Site Scripting via CSRF to Sliders Form - CVE-2021-47975
WordPress Plugin WP Learn Manager 1.1.2 Stored XSS - CVE-2021-47957
WordPress Plugin Cookie Law Bar 1.2.1 Stored XSS via clb_bar - CVE-2021-47955
CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload - CVE-2021-47934
MyBB Timeline Plugin 1.0 Cross-Site Scripting and CSRF
V. Comments for CVE-2026-6252
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