---
id: CVE-2026-78087
title: >-
  The VK Blocks plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via Group Block 'linkToPost' Feature in all versions up to, and
  including, 1.126.1 due to insufficient input sanitization and output escaping
summary: >-
  The VK Blocks plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via Group Block 'linkToPost' Feature in all versions up to, and
  including, 1.126.1 due to insufficient input sanitization and output escaping.
  This makes it …
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: vektor-inc
product: VK Blocks
affected:
  - vk_blocks <= 1.126.1
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T06:17:04.787'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78087'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3664034/vk-blocks/trunk/inc/vk-blocks/view/class-vk-blocks-link-to-post.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/c76615ef-8b58-423f-aa29-d9c8a688f0fe?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T05:52:45.964Z'
---

## Overview

The VK Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Group Block 'linkToPost' Feature in all versions up to, and including, 1.126.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.