CVE Catalog

CVE-2026-9656

MediumCVSS 4.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.16%

5th percentile - higher than 5% of all known CVEs

Summary

The HubSpot All-In-One Marketing plugin for WordPress up to version 11.3.62 exposes the plaintext HubSpot OAuth refresh token via the window.leadinConfig JavaScript object. An authenticated attacker with contributor-level access or higher can extract this token and gain access to data in the connected HubSpot tenant.

Risk Assessment

The organization risks unauthorized access to HubSpot data, including potential modification, leading to customer data leakage and business disruption.

Recommendation

Immediately update the HubSpot All-In-One Marketing plugin to the latest available version that fixes this vulnerability. Restrict WordPress user accounts to only necessary roles.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS