CVE-2023-30320Network attack vector

Stored script execution via unescaped chat messages

Published Jul 6, 2023 · Updated Nov 20, 2024

Stored cross-site scripting in wliang6 ChatEngine 1.0 allows remote authenticated users to execute script in a victim's browser. The chatWindow servlet stores the txtMsg request parameter in Derby and later writes it unescaped into the textMessage textarea. An attacker needs a valid chat session to submit a message, and execution occurs when another user opens or refreshes the chat window.

CVSS severityUnavailable
Unscored
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in wliang6 ChatEngine 1.0 allows remote authenticated users to execute script in a victim's browser. The chatWindow servlet stores the txtMsg request parameter in Derby and later writes it unescaped into the textMessage textarea. An attacker needs a valid chat session to submit a message, and execution occurs when another user opens or refreshes the chat window.

The record

CVE
CVE-2023-30320
Published
Jul 6, 2023
Updated
Nov 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2024Record 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

No CVSS assessment is available in this record.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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