# CVE-2021-32542: SysJust CTS Web - Reflected XSS

> Unauthenticated attackers can execute reflected XSS to steal user connection tokens in the SysJust CTS Web trading system.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N`)
- **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:** 28 May 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-f5hm-hjxq-fhw3

## What is CVE-2021-32542?

CVE-2021-32542 is a medium-severity cross-site scripting vulnerability in SysJust CTS Web, published on 28 May 2021. 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

The parameters of the specific functions in the CTS Web trading system do not filter special characters, which allows unauthenticated attackers can remotely perform reflected XSS and obtain the users’ connection token that triggered the attack.

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

## Which versions are affected by CVE-2021-32542?

It affects 1 product.


Products: Sysjust Cts Web.

## How do I fix CVE-2021-32542?

No fix has been published for CVE-2021-32542 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-32542 being exploited?

There is no known exploitation of CVE-2021-32542 in the wild and no public exploit code.

## Other vulnerabilities in SysJust CTS Web

- [CVE-2021-32543](https://insights.sbomify.com/CVE-2021-32543/): SysJust CTS Web - Broken Authentication (medium 6.5)
- [CVE-2021-32541](https://insights.sbomify.com/CVE-2021-32541/): SysJust CTS Web - Broken Access Control (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-32542 and fix it if it is affected.

What it is: CVE-2021-32542 is a medium-severity cross-site scripting vulnerability in SysJust CTS Web, published on 28 May 2021. 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-2021-32542 in the wild and no public exploit code.

Affected product: SysJust CTS Web. 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-2021-32542/ (Markdown: https://insights.sbomify.com/CVE-2021-32542/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-32542
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-32542
- OSV: https://osv.dev/vulnerability/CVE-2021-32542

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-32542/
Summaries are generated and may contain mistakes; the official description above is the record.