CVE-2026-78087CWE-79cross-site-scripting

CVE-2026-78087

Medium · published October 15, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
8.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00190 · 8.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-15T10:17Z
References (2)
https://plugins.trac.wordpress.org/changeset/3664034/vk-blocks/trunk/inc/vk-blocks/view/class-vk-blocks-link-to-post.php · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/c76615ef-8b58-423f-aa29-d9c8a688f0fe?source=cve · [email protected]
EPSS history
Timeline
  • 16 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 15 OCT 05:30Z
    VK Blocks <= 1.126.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Group Block 'linkToPost' Feature
    cvelistv5
  • 15 OCT 05:30Z
    VK Blocks <= 1.126.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Group Block 'linkToPost' Feature
    cvelistv5