What the vulnerability does
01Description
The HubSpot All-In-One Marketing – Forms, Popups, Live Chat plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 11.3.62 via the wp_localize_script() / window.leadinConfig JavaScript object. This makes it possible for authenticated attackers, with contributor-level access and above, to extract the site's plaintext HubSpot OAuth refresh token exposed via the window.leadinConfig JavaScript object, which can then be used to access or modify data in the connected HubSpot tenant. Although the refresh token is stored at rest with AES-256-CTR encryption, decryption occurs server-side before the plaintext value is passed to wp_localize_script(), rendering the at-rest encryption ineffective against this exposure path.
Explanation of Vulnerability in Simple Terms
02Summary
The HubSpot All-In-One Marketing plugin contains an information exposure vulnerability affecting versions up to 11.3.62. An authenticated user with low privileges can access sensitive data that should be restricted. The vulnerability requires network access and valid login credentials but no additional user interaction. Site administrators should update to a version newer than 11.3.62 to remediate this issue.
What an attacker can do
03Attacker Capabilities
Read sensitive data accessible only to higher-privilege users or other restricted information.
Potential impact on your site
04Site Impact
Authenticated users can view data they should not have access to, risking exposure of private information.
Conditions required to exploit
05Prerequisites
Attacker must have a valid low-privilege account on the site; network access required.
Key dates
06Disclosure timeline
July 17, 2026
CVE published
