CVE-2023-42034Network attack vector

Authentication bypass via unvalidated script injection

Published May 3, 2024 · Updated Aug 2, 2024

Cross-site scripting in Visualware MyConnection Server 11.3c allows remote attackers to bypass authentication via crafted input. The doRTAAccessCTConfig method does not validate user-supplied data, permitting arbitrary script injection. Minimal user interaction is required, after which the injected script enables access beyond the authentication boundary.

CVSS severity8.8
High
EPSS probability1.36%
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 Visualware MyConnection Server 11.3c allows remote attackers to bypass authentication via crafted input. The doRTAAccessCTConfig method does not validate user-supplied data, permitting arbitrary script injection. Minimal user interaction is required, after which the injected script enables access beyond the authentication boundary.

The record

CVE
CVE-2023-42034
Published
May 3, 2024
Updated
Aug 2, 2024
Vendor
Visualware
Product
MyConnection Server
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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

  1. Affected versionversion=11.3c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Visualware · MyConnection Serverversion=11.3c

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/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 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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