CVE-2025-51400Public exploitNetwork attack vector

Stored XSS via unescaped canned message content

Published Jul 21, 2025 · Updated Jul 22, 2025

Stored XSS in Live Helper Chat 4.60 allows remote authenticated users to execute JavaScript through personal canned messages. Personal canned-message content is stored without adequate neutralization and later inserted into chat-window output without escaping, so event-handler markup executes when rendered. Operator access is required to save the payload, and execution occurs when an operator opens the canned-message interface to send the saved message.

CVSS severity5.4
Medium
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Live Helper Chat 4.60 allows remote authenticated users to execute JavaScript through personal canned messages. Personal canned-message content is stored without adequate neutralization and later inserted into chat-window output without escaping, so event-handler markup executes when rendered. Operator access is required to save the payload, and execution occurs when an operator opens the canned-message interface to send the saved message.

The record

CVE
CVE-2025-51400
Published
Jul 21, 2025
Updated
Jul 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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