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CVE-2026-9656— HubSpot All-In-One Marketing <= 11.3.62 - Authenticated (Contributor+) Sensitive Information Exposure via Block Editor Localized Script

Quick assessment

Affected
hubspotdev HubSpot All-In-One Marketing – Forms, Popups, Live Chat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress HubSpot All-In-One Marketing是WordPress基金会的一款整合营销与客户关系管理功能的软件。 WordPress HubSpot All-In-One Marketing 11.3.62及之前版本存在信息泄露漏洞，该漏洞源于通过wp_localize_script() / window.leadinConfig JavaScript对象暴露敏感信息，导致经过身份验证且拥有贡献者级别及以上权限的攻击者能够提取站点的明文HubSpot OAuth刷新令牌，进而

CVSS 4.3 · Medium EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
hubspotdev HubSpot All-In-One Marketing – Forms, Popups, Live Chat ≤ 11.3.62 affected
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I. Basic Information for CVE-2026-9656

Vulnerability Information
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Vulnerability Title
HubSpot All-In-One Marketing <= 11.3.62 - Authenticated (Contributor+) Sensitive Information Exposure via Block Editor Localized Script
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress HubSpot All-In-One Marketing 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress HubSpot All-In-One Marketing是WordPress基金会的一款整合营销与客户关系管理功能的软件。 WordPress HubSpot All-In-One Marketing 11.3.62及之前版本存在信息泄露漏洞，该漏洞源于通过wp_localize_script() / window.leadinConfig JavaScript对象暴露敏感信息，导致经过身份验证且拥有贡献者级别及以上权限的攻击者能够提取站点的明文HubSpot OAuth刷新令牌，进而
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hubspotdev HubSpot All-In-One Marketing – Forms, Popups, Live Chat 0 ~ 11.3.62 -

II. Public POCs for CVE-2026-9656

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III. Intelligence Information for CVE-2026-9656

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Patches & Fixes for CVE-2026-9656 (1)

Security Blog Posts for CVE-2026-9656 (1)

IV. Related Vulnerabilities

Same product: HubSpot All-In-One Marketing – Forms, Popups, Live Chat
Same vendor: hubspotdev
Same weakness: CWE-200

V. Comments for CVE-2026-9656

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