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CVE-2026-9709— Themeco Cornerstone < 7.8.9 (Premium, bundled with X Theme) - Subscriber+ Arbitrary User Meta Disclosure

Quick assessment

Affected
Unknown Cornerstone
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.

Cornerstone是THEMECO公司的一款 WordPress 全站可视化编辑平台，搭配 Pro Theme 可实现从零开始完全自定义网站设计。 THEMECO Cornerstone 7.8.9之前版本存在信息泄露漏洞，该漏洞源于未对其REST API路由强制执行功能检查，导致任何经过身份验证的用户泄露其他用户的元数据。

AI Predicted 5.3 Difficulty: Easy EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Cornerstone 3.0.0< 7.8.9 affected
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I. Basic Information for CVE-2026-9709

Vulnerability Information
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Vulnerability Title
Themeco Cornerstone < 7.8.9 (Premium, bundled with X Theme) - Subscriber+ Arbitrary User Meta Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
The Cornerstone WordPress plugin before 7.8.9 does not enforce capability checks on one of its REST API routes, allowing any authenticated user to disclose the metadata of any other user, including roles, session token previews and stored billing/shipping fields. This affects the premium co Cornerstone page builder distributed bundled with the X , not the unrelated free `cornerstone` Cornerstone WordPress plugin before 7.8.9 (v0.8.x) on the .org repository.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
THEMECO Cornerstone 日志信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cornerstone是THEMECO公司的一款 WordPress 全站可视化编辑平台，搭配 Pro Theme 可实现从零开始完全自定义网站设计。 THEMECO Cornerstone 7.8.9之前版本存在信息泄露漏洞，该漏洞源于未对其REST API路由强制执行功能检查，导致任何经过身份验证的用户泄露其他用户的元数据。
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
Unknown Cornerstone 3.0.0 ~ 7.8.9 -

II. Public POCs for CVE-2026-9709

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III. Intelligence Information for CVE-2026-9709

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News Coverage for CVE-2026-9709 (1)

Same Patch Batch · Unknown · 2026-06-24 · 6 CVEs total

CVE-2026-9710 Themeco Cornerstone < 7.8.8 (Premium, bundled with X Theme) - Subscriber+ Arbitrary User P
CVE-2026-10531 AI Share & Summarize < 2.0.4 - Contributor+ Stored XSS via title_style Shortcode Attribute
CVE-2026-10753 Site Kit by Google < 1.176.0 - Editor+ Email Reporting Settings Update
CVE-2026-10749 Post Duplicator < 3.0.15 - Contributor+ PHP Object Injection via customMetaData
CVE-2026-10735 ShapedPlugin Multiple Pro Plugins - Backdoor via Compromised Vendor Update Server

IV. Related Vulnerabilities

Same product: Cornerstone
Same vendor: Unknown

V. Comments for CVE-2026-9709

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