# CVE-2021-47743: COMMAX Biometric Access Control System 1.0.0 Reflected XSS via Cookie Parameters

> Attackers can execute arbitrary scripts in victim browsers via reflected XSS in cookie parameters of the COMMAX Biometric Access Control System.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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:** 31 Dec 2025
- **Updated:** 24 May 2026
- **Also known as:** GHSA-x357-46c7-h4hf

## What is CVE-2021-47743?

CVE-2021-47743 is a medium-severity cross-site scripting vulnerability in COMMAX Biometric Access Control System, published on 31 Dec 2025. 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

COMMAX Biometric Access Control System 1.0.0 contains an unauthenticated reflected cross-site scripting vulnerability in cookie parameters 'CMX_ADMIN_NM' and 'CMX_COMPLEX_NM'. Attackers can inject malicious HTML and JavaScript code into these cookie values to execute arbitrary scripts in a victim's browser session.

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

## Which versions are affected by CVE-2021-47743?


## How do I fix CVE-2021-47743?

No fix has been published for CVE-2021-47743 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47743 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47743 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47743 and fix it if it is affected.

What it is: CVE-2021-47743 is a medium-severity cross-site scripting vulnerability in COMMAX Biometric Access Control System, published on 31 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47743 exists.

Affected product: COMMAX Biometric Access Control System. 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-2021-47743/ (Markdown: https://insights.sbomify.com/CVE-2021-47743/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47743
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47743
- OSV: https://osv.dev/vulnerability/CVE-2021-47743

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-47743/
Summaries are generated and may contain mistakes; the official description above is the record.