CVE-2023-4496— Easy Chat Server XSS vulnerability
Quick assessment
Affected
EFS Software Easy Chat Server
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.
Chat Server是ramank775个人开发者的基于微服务架构的聊天服务器，支持高可用、高吞吐、横向扩展。 Chat Server 3.1版本存在跨站脚本漏洞，该漏洞源于mtowho参数存在存储型跨站脚本（XSS）漏洞。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2023-4496
Vulnerability Information
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Vulnerability Title
Easy Chat Server XSS vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Easy Chat Server, in its 3.1 version and before, does not sufficiently encrypt user-controlled inputs, resulting in a Cross-Site Scripting (XSS) vulnerability stored via /body2.ghp (POST method), in the mtowho parameter.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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
Chat Server 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chat Server是ramank775个人开发者的基于微服务架构的聊天服务器，支持高可用、高吞吐、横向扩展。 Chat Server 3.1版本存在跨站脚本漏洞，该漏洞源于mtowho参数存在存储型跨站脚本（XSS）漏洞。
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 |
|---|---|---|---|---|
| EFS Software | Easy Chat Server | 0 ~ 3.1 | - |
|
II. Public POCs for CVE-2023-4496
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2023-4496 (1)
Same Patch Batch · EFS Software · 2023-10-04 · 7 CVEs total
| CVE-2023-4494 | 9.8 CRITICAL | Easy Chat Server Stack-based buffer overflow vulnerability |
| CVE-2023-4491 | 9.8 CRITICAL | Easy Address Book Web Server Buffer overflow vulnerability |
| CVE-2023-4497 | 6.1 MEDIUM | Easy Chat Server XSS vulnerability |
| CVE-2023-4495 | 6.1 MEDIUM | Easy Chat Server XSS vulnerability |
| CVE-2023-4493 | 6.1 MEDIUM | Easy Address Book Web Server Stored XSS vulnerability |
| CVE-2023-4492 | 6.1 MEDIUM | Easy Address Book Web Server XSS vulnerability |
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Same vendor: EFS Software
Same weakness: CWE-79
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V. Comments for CVE-2023-4496
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