CVE-2026-0483— Stored Cross-Site Scripting (XSS) vulnerability in LiveHelperChat
Quick assessment
Affected
LiveHelperChat LiveHelperChat
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.
Live Helper Chat是个人开发者（Live Helper Chat）的一款开源的支持在线聊天的插件。为web平台提供聊天功能。 Live Helper Chat 4.72之前版本存在跨站脚本漏洞，该漏洞源于PDF文件上传功能存在存储型跨站脚本，可能导致执行任意JavaScript代码。
Possible ATT&CK Techniques 3 AI
T1001 · Data Obfuscation T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-0483
Vulnerability Information
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Vulnerability Title
Stored Cross-Site Scripting (XSS) vulnerability in LiveHelperChat
Source: CVE Program / CVE List V5
Vulnerability Description
Stored Cross-Site Scripting (XSS) vulnerability in the PDF file upload functionality of Live Helper Chat, versions prior to 4.72. An attacker can upload a malicious PDF file containing an XSS payload, which will be executed in the user's context when they download and open the file via the link generated by the application. The vulnerability allows arbitrary JavaScript code to be executed in the user's local context.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/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
Live Helper Chat 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Live Helper Chat是个人开发者（Live Helper Chat）的一款开源的支持在线聊天的插件。为web平台提供聊天功能。 Live Helper Chat 4.72之前版本存在跨站脚本漏洞，该漏洞源于PDF文件上传功能存在存储型跨站脚本，可能导致执行任意JavaScript代码。
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 |
|---|---|---|---|---|
| LiveHelperChat | LiveHelperChat | 0 ~ 4.72 | - |
|
II. Public POCs for CVE-2026-0483
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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Same weakness: CWE-79
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WordPress Starter Templates plugin <= 4.7.7 - Cross Site Scr
V. Comments for CVE-2026-0483
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