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CVE-2026-53952— GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw

Quick assessment

Affected
GetSimpleCMS-CE GetSimpleCMS-CE
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.

GetSimpleCMS-CE是GetSimpleCMS-CE个人开发者开源的一款内容管理系统软件。 GetSimpleCMS-CE 3.4.0a及之前版本和GetSimpleCMS-CE 3.3.22及之前版本存在安全漏洞，该漏洞源于安装后删除敏感文件admin/setup.php的自动安全控制存在自我排除缺陷，导致未经身份验证的攻击者可访问安装脚本创建新的管理员账户。

CVSS 9.8 · Critical EPSS 0.55% · P45

Affected Version Matrix 2

VendorProduct Version RangeStatus
GetSimpleCMS GetSimpleCMS <= 3.4.0a affected
GetSimpleCMS-CE GetSimpleCMS-CE <= 3.3.22 affected
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I. Basic Information for CVE-2026-53952

Vulnerability Information
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Vulnerability Title
GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw
Source: CVE Program / CVE List V5
Vulnerability Description
GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. A logic flaw in GetSimple CMS (v3.4.0a and below) and GetSimpleCMS-CE (v3.3.22 and below) allows unauthenticated attackers to create a new administrator account. The application features an automated security control designed to delete the sensitive `admin/setup.php` file post-installation. However, this control is neutralized by a self-exclusion bug within the deletion logic, leaving the setup script accessible for unauthorized account creation even after a legitimate installation is completed. As of time of publication, no known patched versions are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
GetSimpleCMS-CE 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GetSimpleCMS-CE是GetSimpleCMS-CE个人开发者开源的一款内容管理系统软件。 GetSimpleCMS-CE 3.4.0a及之前版本和GetSimpleCMS-CE 3.3.22及之前版本存在安全漏洞，该漏洞源于安装后删除敏感文件admin/setup.php的自动安全控制存在自我排除缺陷，导致未经身份验证的攻击者可访问安装脚本创建新的管理员账户。
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
GetSimpleCMS-CE GetSimpleCMS-CE <= 3.3.22 -
GetSimpleCMS GetSimpleCMS <= 3.4.0a -

II. Public POCs for CVE-2026-53952

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III. Intelligence Information for CVE-2026-53952

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Vendor Advisories for CVE-2026-53952 (1)

IV. Related Vulnerabilities

Same product: GetSimpleCMS-CE
Same vendor: GetSimpleCMS-CE
Same weakness: CWE-285

V. Comments for CVE-2026-53952

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