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CVE-2026-56662— GetSimple CMS: Missing CSRF protection in UpdateCE allows forging a privileged server-side update request

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.

GetSimple CMS 是一款内容管理系统（CMS），而 GetSimple CMS CE 是该系统的社区版。在 1.5 版本之前，UpdateCE 更新表单中未包含任何防 CSRF（跨站请求伪造）令牌，且其 POST 处理程序也未执行任何令牌或请求来源验证。远程攻击者可以托管一个页面，该页面会自动向更新端点提交伪造的 POST 请求；当已认证的管理员访问该页面时，服务器将在管理员会话中执行由攻击者指定的下载并部署操作——无需进一步交互。由于所部署的内容会被执行（参见相关的 ZIP 解压安全公告），这将导致远程

CVSS 9.6 · Critical
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I. Basic Information for CVE-2026-56662

Vulnerability Information
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Vulnerability Title
GetSimple CMS: Missing CSRF protection in UpdateCE allows forging a privileged server-side update request
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. Prior to version 1.5, the UpdateCE update form contained no anti-CSRF token, and the POST handler performed no token or request-origin verification. A remote attacker can host a page that auto-submits a forged POST to the update endpoint; when an authenticated administrator visits it, the server performs an attacker-directed download-and-deploy operation in the administrator's session — with no further interaction. Because the deployed content is executed (see the related ZIP-extraction advisory), this yields remote code execution. The url field is additionally written into the form unescaped, providing a secondary HTML-injection sink via a malicious upgrade.json. This issue has been patched in version 1.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GetSimpleCMS-CE GetSimpleCMS-CE < 1.5 -

II. Public POCs for CVE-2026-56662

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III. Intelligence Information for CVE-2026-56662

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Vendor Advisories for CVE-2026-56662 (1)

Same Patch Batch · GetSimpleCMS-CE · 2026-10-01 · 7 CVEs total

CVE-2026-53953 9.1 CRITICAL GetSimple CMS: Predictable Password Reset Password Allows Administrator Account Takeover
CVE-2026-56660 9.1 CRITICAL GetSimple CMS: CSRF, SSRF, and Unrestricted Zip Extraction
CVE-2026-70650 8.8 HIGH GetSimple CMS: Authenticated Stored XSS in backup viewer (backup-edit.php) via output deco
CVE-2026-71542 8.7 HIGH GetSimple CMS: Stored Cross-Site Scripting (XSS) via the "title" parameter in admin/compon
CVE-2026-56661 7.5 HIGH GetSimple CMS: Server-Side Request Forgery in the UpdateCE update endpoint
CVE-2026-71426 7.1 HIGH GetSimple CMS: Authenticated Stored Local File Inclusion (LFI) via page "template" field

IV. Related Vulnerabilities

Same product: GetSimpleCMS-CE
Same vendor: GetSimpleCMS-CE
Same weakness: CWE-352

V. Comments for CVE-2026-56662

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