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CVE-2021-47870— GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS

Quick assessment

Affected
GetSimple CMS My SMTP Contact Plugin
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 1.1.2版本存在跨站脚本漏洞，该漏洞源于清理和转义不足，可能导致存储型跨站脚本攻击。

AI Predicted 5.4 Difficulty: Moderate EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
GetSimple CMS My SMTP Contact Plugin 1.1.2 affected
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I. Basic Information for CVE-2021-47870

Vulnerability Information
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Vulnerability Title
GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS
Source: CVE Program / CVE List V5
Vulnerability Description
GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
Vulnerability Title
GetSimple CMS 跨站脚本漏洞
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 1.1.2版本存在跨站脚本漏洞，该漏洞源于清理和转义不足，可能导致存储型跨站脚本攻击。
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

Vendor Product Affected Versions CPE Subscribe
GetSimple CMS My SMTP Contact Plugin 1.1.2 -

II. Public POCs for CVE-2021-47870

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III. Intelligence Information for CVE-2021-47870

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Proof of Concept for CVE-2021-47870 (1)

Same Patch Batch · GetSimple CMS · 2026-01-21 · 3 CVEs total

CVE-2021-47860 5.3 MEDIUM GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE
CVE-2021-47830 GetSimple CMS My SMTP Contact Plugin 1.1.1 - CSRF

IV. Related Vulnerabilities

Same product: My SMTP Contact Plugin
Same vendor: GetSimple CMS
Same weakness: CWE-79

V. Comments for CVE-2021-47870

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