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CVE-2026-9842— Backstage <= 1.4.2 - Unauthenticated Privilege Escalation via Permissive Demo Role Capabilities

Quick assessment

Affected
pixelgrade Backstage – Customizer Demo Access
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.

pixelgrade Backstage是pixelgrade公司的一款Web组件。 pixelgrade Backstage 1.4.2及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于插件为demo角色分配了过高的 权限，可能导致未经身份验证的攻击者绕过Customizer并更新任意WordPress选项，从而导致权限提升。

CVSS 7.5 · High EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
pixelgrade Backstage – Customizer Demo Access ≤ 1.4.2 affected
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I. Basic Information for CVE-2026-9842

Vulnerability Information
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Vulnerability Title
Backstage <= 1.4.2 - Unauthenticated Privilege Escalation via Permissive Demo Role Capabilities
Source: CVE Program / CVE List V5
Vulnerability Description
The Backstage - Customizer Demo Access plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.4.2. This is due to the plugin assigning the `manage_options` capability to the `backstage_customizer_user` demo role, which is more permissive than necessary for Customizer-only demo access. This makes it possible for unauthenticated attackers to navigate beyond the Customizer and update arbitrary WordPress options such as `default_role`, leading to privilege escalation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
pixelgrade Backstage 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pixelgrade Backstage是pixelgrade公司的一款Web组件。 pixelgrade Backstage 1.4.2及之前版本存在权限许可和访问控制问题漏洞，该漏洞源于插件为demo角色分配了过高的`manage_options`权限，可能导致未经身份验证的攻击者绕过Customizer并更新任意WordPress选项，从而导致权限提升。
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
pixelgrade Backstage – Customizer Demo Access 0 ~ 1.4.2 -

II. Public POCs for CVE-2026-9842

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III. Intelligence Information for CVE-2026-9842

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Patches & Fixes for CVE-2026-9842 (1)

Vendor Advisories for CVE-2026-9842 (1)

IV. Related Vulnerabilities

Same vendor: pixelgrade
Same weakness: CWE-269

V. Comments for CVE-2026-9842

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