High severity · published Mar 19, 2026
CVE-2026-25438
WordPress Gutenberg Blocks – Unlimited blocks For Gutenberg plugin <= 1.2.8 - Reflected Cross Site Scripting (XSS) vulnerability
7.1
CVSS
0.2%
EPSS
No
On KEV
Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeHunk Gutenberg Blocks unlimited-blocks allows Reflected XSS.This issue affects Gutenberg Blocks: from n/a through <= 1.2.8.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GB
Gutenberg Blocks · ThemeHunk
through 1.2.8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25438
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-25438
patchstack.com
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
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