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CVE-2026-9656

MEDIUM 4.3 CVSS 3.1
Published
July 17, 2026
Last modified
July 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-200
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

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.

Affected WordPress components

  • HubSpot All-In-One Marketing – Forms, Popups, Live Chat Plugin · leadin
    Confirmed match Active
    Up to and including 11.3.62
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • hubspotdev HubSpot All-In-One Marketing – Forms, Popups, Live Chat — Up to and including 11.3.62

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/admin/class-adminconstants.php#L190
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/admin/class-gutenberg.php#L44
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/auth/class-oauth.php#L46
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/class-assetsmanager.php#L150
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?old_path=%2Fleadin/tags/11.3.62&new_path=%2Fleadin/tags/11.3.64
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/718d7ea3-d8ba-46a0-9ab1-72657bd82c17?source=cve
  • nvd.nist.gov Official NVD record