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CVE-2021-47733— CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding

CVSS 6.1 · Medium EPSS 0.05% · P16
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I. Basic Information for CVE-2021-47733

Vulnerability Information
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Vulnerability Title
CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding
Source: NVD (National Vulnerability Database)
Vulnerability Description
CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
CMSimple 跨站脚本漏洞
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版本存在跨站脚本漏洞，该漏洞源于输入过滤可被HTML转Unicode编码绕过，可能导致跨站脚本攻击。
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

VendorProductAffected VersionsCPESubscribe
CmsimpleCMSimple <=5.4 -

II. Public POCs for CVE-2021-47733

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III. Intelligence Information for CVE-2021-47733

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

CVE-2021-477358.8 HIGHCMSimple 5.4 Authenticated Remote Code Execution via Template Editing
CVE-2021-477347.8 HIGHCMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution
CVE-2021-477326.1 MEDIUMCMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input

IV. Related Vulnerabilities

Same product: CMSimple
Same vendor: Cmsimple
Same weakness: CWE-79

V. Comments for CVE-2021-47733

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