CVE-2026-66696 MEDIUM

CVE-2026-66696: WordPress Gutenberg Blocks by Kadence Blocks plugin <= 3.7.8 - Sensitive Data Exposure vulnerability

Vendor Nexcess

Product Gutenberg Blocks by Kadence Blocks

Weakness CWE-201

Published August 6, 2026

Last update August 6, 2026

View on NVD All CVEs

CVSS base score

4.3/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality Low

Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

Contributor Sensitive Data Exposure in Gutenberg Blocks by Kadence Blocks <= 3.7.8 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Kadence Blocks versions up to 3.7.8 leak sensitive information in outbound data. An authenticated user with low privileges can trigger the plugin to expose data in network communications. The exposure is limited to confidentiality; site functionality and data integrity are not affected. Update to a version newer than 3.7.8.

What an attacker can do

03Attacker Capabilities

View sensitive information transmitted by the plugin in network communications.

Potential impact on your site

04Site Impact

Sensitive data may be exposed to users with basic site access; review plugin communications for data leakage.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege authenticated account on the site.

Key dates

06Disclosure timeline

August 6, 2026 CVE published

August 6, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-66696 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/201.html AskarLabs — CWE-201 write-up Insertion of Sensitive Information Into Sent Data

Related vulnerabilities

Identifiers

CVE CVE-2026-66696

CWE CWE-201

CVSS 4.3 / MEDIUM

Affected versions