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CVE-2021-47734— CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution

Quick assessment

Affected
Cmsimple CMSimple
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.

CMSimple是CMSimple开源的一种自由的内容管理系统。 CMSimple 5.4版本存在安全漏洞，该漏洞源于对PHP会话文件路径操作不当，可能导致本地文件包含和任意代码执行。

CVSS 7.8 · High EPSS 0.79% · P54
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I. Basic Information for CVE-2021-47734

Vulnerability Information
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Vulnerability Title
CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
CMSimple 5.4 contains an authenticated local file inclusion vulnerability that allows remote attackers to manipulate PHP session files and execute arbitrary code. Attackers can leverage the vulnerability by changing the functions file path and uploading malicious PHP code through session file upload mechanisms.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
PHP程序中Include/Require语句包含文件控制不恰当(PHP远程文件包含)
Source: CVE Program / CVE List V5
Vulnerability Title
CMSimple 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CMSimple是CMSimple开源的一种自由的内容管理系统。 CMSimple 5.4版本存在安全漏洞，该漏洞源于对PHP会话文件路径操作不当，可能导致本地文件包含和任意代码执行。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cmsimple CMSimple CMSimple 5.4 -

II. Public POCs for CVE-2021-47734

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III. Intelligence Information for CVE-2021-47734

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Same Patch Batch · Cmsimple · 2025-12-23 · 4 CVEs total

CVE-2021-47735 8.8 HIGH CMSimple 5.4 Authenticated Remote Code Execution via Template Editing
CVE-2021-47732 6.1 MEDIUM CMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input
CVE-2021-47733 6.1 MEDIUM CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding

IV. Related Vulnerabilities

Same product: CMSimple
Same vendor: Cmsimple
Same weakness: CWE-98

V. Comments for CVE-2021-47734

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