Stored Cross-Site Scripting Vulnerability in Meta Field Block Plugin for WordPress
CVE-2026-6252

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Meta Field Block – Display Custom Fields In The Block Editor Without Coding
Vendor
CVE Published:
14 May 2026

What is CVE-2026-6252?

The Meta Field Block plugin for WordPress is affected by a vulnerability allowing for Stored Cross-Site Scripting via the 'tagName' block attribute. This issue arises from inadequate input sanitization and output escaping, enabling authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages. Consequently, these scripts may execute whenever a user accesses the affected page, posing significant security risks.

Affected Version(s)

Meta Field Block – Display custom fields in the Block Editor without coding 0 <= 1.5.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3517519/disp...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muhammad Yudha - DJ
.