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CVE-2026-28495— GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php

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GetSimple CMS开源的一个内容管理系统。 GetSimple CMS v3.3.22版本存在跨站请求伪造漏洞，该漏洞源于缺少CSRF保护，可能导致远程未经验证攻击者通过跨站请求伪造实现远程代码执行。

CVSS 9.7 · Critical EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-28495

Vulnerability Information
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Vulnerability Title
GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php
Source: CVE Program / CVE List V5
Vulnerability Description
GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.
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
Vulnerability Title
GetSimple CMS 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GetSimple CMS是GetSimple CMS开源的一个内容管理系统。 GetSimple CMS v3.3.22版本存在跨站请求伪造漏洞，该漏洞源于缺少CSRF保护，可能导致远程未经验证攻击者通过跨站请求伪造实现远程代码执行。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
GetSimpleCMS-CE GetSimpleCMS-CE <= 3.3.22 -

II. Public POCs for CVE-2026-28495

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III. Intelligence Information for CVE-2026-28495

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Vendor Advisories for CVE-2026-28495 (1)

IV. Related Vulnerabilities

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