Stored Cross-Site Scripting in VK Blocks for WordPress
CVE-2026-78087

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Vk Blocks
Vendor
CVE Published:
15 October 2026

What is CVE-2026-78087?

The VK Blocks plugin for WordPress is susceptible to a Stored Cross-Site Scripting vulnerability through its Group Block 'linkToPost' feature. This issue arises due to inadequate input sanitization and output escaping practices existing in all releases up to and including version 1.126.1. As a result, authenticated users with contributor-level access or higher can exploit this vulnerability to inject arbitrary web scripts. These scripts can execute automatically when other users access the manipulated pages, potentially compromising user data and site integrity.

Affected Version(s)

VK Blocks 0 <= 1.126.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3664034/vk-b...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

theviper17y
.