CVE-2025-62413— MQTTX vulnerable to cross-site scripting via improper message payload rendering
Quick assessment
Affected
emqx MQTTX
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.
MQTTX是EMQ Technologies开源的一个MQTT客户端工具箱。 MQTTX 1.12.0版本存在跨站脚本漏洞，该漏洞源于MQTT消息有效载荷渲染处理不当，可能导致跨站脚本攻击。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-62413
Vulnerability Information
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Vulnerability Title
MQTTX vulnerable to cross-site scripting via improper message payload rendering
Source: CVE Program / CVE List V5
Vulnerability Description
MQTTX is an MQTT 5.0 desktop client and MQTT testing tool. A Cross-Site Scripting (XSS) vulnerability was introduced in MQTTX v1.12.0 due to improper handling of MQTT message payload rendering. Malicious payloads containing HTML or JavaScript could be rendered directly in the MQTTX message viewer. If exploited, this could allow attackers to execute arbitrary scripts in the context of the application UI — for example, attempting to access MQTT connection credentials or trigger unintended actions through script injection. This vulnerability is especially relevant when MQTTX is used with brokers in untrusted or multi-tenant environments, where message content cannot be fully controlled. This vulnerability is fixed in 1.12.1.
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
MQTTX 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MQTTX是EMQ Technologies开源的一个MQTT客户端工具箱。 MQTTX 1.12.0版本存在跨站脚本漏洞，该漏洞源于MQTT消息有效载荷渲染处理不当，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
II. Public POCs for CVE-2025-62413
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V. Comments for CVE-2025-62413
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