CVE-2025-62413Network attack vector

Script execution via unescaped MQTT message payloads

Published Oct 16, 2025 · Updated Oct 16, 2025

Cross-site scripting in EMQ MQTTX 1.12.0 allows remote attackers to execute scripts through crafted MQTT message payloads. TreeNodeInfo converts a selected payload to text for UI rendering without first escaping HTML metacharacters in XML-like input. Execution requires receipt of attacker-controlled content from an untrusted or multi-tenant broker and a user viewing the message; scripts run in the application UI and can access renderer-exposed data or initiate UI actions.

CVSS severity6.1
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in EMQ MQTTX 1.12.0 allows remote attackers to execute scripts through crafted MQTT message payloads. TreeNodeInfo converts a selected payload to text for UI rendering without first escaping HTML metacharacters in XML-like input. Execution requires receipt of attacker-controlled content from an untrusted or multi-tenant broker and a user viewing the message; scripts run in the application UI and can access renderer-exposed data or initiate UI actions.

The record

CVE
CVE-2025-62413
Published
Oct 16, 2025
Updated
Oct 16, 2025
Vendor
EMQ
Product
MQTTX
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 1.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

EMQ · MQTTXversion== 1.12.0

Published CVSS scores

6.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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