What the vulnerability does
01Description
The VK All in One Expansion Unit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'vkExUnit_cta_url' and 'vkExUnit_cta_button_text' parameters in all versions up to, and including, 9.112.1. This is due to a logic error in the CTA save function that reads sanitization callbacks from the wrong variable ($custom_field_name instead of $custom_field_options), causing the sanitization to never be applied. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that execute when a user accesses an injected page.",
Explanation of Vulnerability in Simple Terms
02Summary
VK All in One Expansion Unit versions up to 9.112.1 contain a cross-site scripting vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has low confidentiality and integrity impact. Scope is changed, meaning the impact may extend beyond the vulnerable component itself.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers or affect site functionality.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other users or site behavior; data exposure or modification possible.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site.
Key dates
06Disclosure timeline
November 18, 2025
CVE published
April 8, 2026
Record updated
