HubSpot All-In-One Marketing <= 11.3.62 - Authenticated (Contributor+) Sensitive Information Exposure via Block Editor Localized Script

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-9656
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-17 08:16:59 UTC
Updated2026-07-17 14:59:38 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.001580000 probability, percentile 0.053760000 (date 2026-07-20)

Problem Types: CWE-200 | CWE-200 CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Hubspotdev HubSpot All-In-One Marketing Forms Popups Live Chat affected 11.3.62 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/class-assetsmanager.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/718d7ea3-d8ba-46a0-9ab1-72657... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/admin/class-gutenberg.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/admin/class-adminconstants... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/leadin/tags/11.3.45/public/auth/class-oauth.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: anhcd05 (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-16T17:50:07.000ZDisclosed

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