# CVE-2023-42034: Visualware MyConnection Server doRTAAccessCTConfig Cross-Site Scripting Authentication Bypass Vulnerability

> Remote attackers can bypass authentication via XSS in MyConnection Server, potentially leading to account takeover.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 3 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-2wqr-hc5g-8c36

## What is CVE-2023-42034?

CVE-2023-42034 is a high-severity cross-site scripting vulnerability in Visualware MyConnection Server, published on 3 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Visualware MyConnection Server doRTAAccessCTConfig Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of Visualware MyConnection Server. Minimal user interaction is required to exploit this vulnerability.

The specific flaw exists within the doRTAAccessCTConfig method. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-21613.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2023-42034?

It affects 1 product.


Products: Visualware Myconnection Server.

## How do I fix CVE-2023-42034?

No fix has been published for CVE-2023-42034 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-42034 being exploited?

There is no known exploitation of CVE-2023-42034 in the wild and no public exploit code.

## Other vulnerabilities in Visualware MyConnection Server

- [CVE-2021-27198](https://insights.sbomify.com/CVE-2021-27198/): File upload in n/a (critical 9.8)
- [CVE-2023-42032](https://insights.sbomify.com/CVE-2023-42032/): Visualware MyConnection Server doRTAAccessUPass Exposed Dangerous Method Information Disclosure Vulnerability (high 7.5)
- [CVE-2021-27509](https://insights.sbomify.com/CVE-2021-27509/): Missing authorization in n/a (high 7.5)
- [CVE-2023-42033](https://insights.sbomify.com/CVE-2023-42033/): Visualware MyConnection Server doPostUploadfiles Directory Traversal Remote Code Execution Vulnerability (high 7.2)
- [CVE-2023-42035](https://insights.sbomify.com/CVE-2023-42035/): Visualware MyConnection Server doIForward XML External Entity Processing Information Disclosure Vulnerability (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-42034 and fix it if it is affected.

What it is: CVE-2023-42034 is a high-severity cross-site scripting vulnerability in Visualware MyConnection Server, published on 3 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-42034 in the wild and no public exploit code.

Affected product: Visualware MyConnection Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-42034/ (Markdown: https://insights.sbomify.com/CVE-2023-42034/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-42034
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-42034
- OSV: https://osv.dev/vulnerability/CVE-2023-42034

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-42034/
Summaries are generated and may contain mistakes; the official description above is the record.