CVE-2026-25438 PUBLISHED

WordPress Gutenberg Blocks – Unlimited blocks For Gutenberg plugin <= 1.2.8 - Reflected Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 02.02.2026 Published: 19.03.2026 Updated: 19.03.2026

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeHunk Gutenberg Blocks allows Reflected XSS.This issue affects Gutenberg Blocks: from n/a through 1.2.8.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
CVSS Score: 7.1

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	ThemeHunk
Product	Gutenberg Blocks
Versions	Default: unaffected affected from n/a to 1.2.8 (incl.)

Credits

Jarno Vos (jrn5151) | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/unlimited-blocks/vulnerability/wordpress-gutenberg-blocks-unlimited-blocks-for-gutenberg-plugin-1-2-8-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

CAPEC-591 Reflected XSS