PT-2026-34304 · WordPress · Zypento Blocks

Athiwat Tiprasaharn · Published 2026-04-22 · Updated 2026-04-23 · CVE-2026-5820

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Zypento Blocks versions prior to 1.0.7

Description The Zypento Blocks plugin for WordPress contains a Stored Cross-Site Scripting issue within the Table of Contents block. The front-end TOC rendering script reads heading text via innerText and inserts it into the page using innerHTML without proper sanitization. This allows authenticated attackers with Author-level access or higher to inject arbitrary web scripts into pages, which then execute when a user visits the affected page.

Recommendations Update the plugin to a version later than 1.0.6.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-5820

Affected Products

Zypento Blocks

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-5820 · Security Note
• https://twitter.com/VulmonFeeds/status/2046925149295759641 · Twitter Post
• https://twitter.com/CVEnew/status/2047428143955505533 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/024a6a0f-f819-40e7-9618-71219c27aa64?source=cve · Note
• https://plugins.trac.wordpress.org/browser/zypento-blocks/tags/1.0.6/assets/js/src/blocks/table-of-contents/view.js#L57 · Note
• https://plugins.trac.wordpress.org/browser/zypento-blocks/tags/1.0.6/assets/js/src/blocks/table-of-contents/view.js#L71 · Note