CVE-2023-30319Public exploitNetwork attack vector

Script execution via unescaped username reflection

Published Jul 6, 2023 · Updated Nov 20, 2024

Reflected XSS in ChatEngine 1.0 allows remote attackers to execute script in a user's browser by submitting a crafted username to the login form. LoginServlet reads the username parameter and writes it directly into an HTML heading without output encoding or sanitization. Exploitation requires a user to submit the crafted login request; the script then runs in that user's ChatEngine origin.

CVSS severity9.6
Critical
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

Reflected XSS in ChatEngine 1.0 allows remote attackers to execute script in a user's browser by submitting a crafted username to the login form. LoginServlet reads the username parameter and writes it directly into an HTML heading without output encoding or sanitization. Exploitation requires a user to submit the crafted login request; the script then runs in that user's ChatEngine origin.

The record

CVE
CVE-2023-30319
Published
Jul 6, 2023
Updated
Nov 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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
Privilegesunauthenticated
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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