# CVE-2021-27659: exacqVision Web Service CSS

> Insufficient input validation in exacqVision Web Service allows attackers to inject malicious scripts, potentially leading to code execution or account takeover.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Jun 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-6h9h-w393-9gcp

## What is CVE-2021-27659?

CVE-2021-27659 is a medium-severity cross-site scripting vulnerability in Johnson Controls exacqVision Web Service, published on 24 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

exacqVision Web Service 21.03 does not sufficiently validate, filter, escape, and/or encode user-controllable input before it is placed in output that is used as a web page that is served to other users.

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

## Which versions are affected by CVE-2021-27659?

It affects 1 product.


Products: Johnsoncontrols Exacqvision Web Service.

## How do I fix CVE-2021-27659?

No fix has been published for CVE-2021-27659 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27659 being exploited?

There is no known exploitation of CVE-2021-27659 in the wild and no public exploit code.

## Other vulnerabilities in Johnson Controls exacqVision Web Service

- [CVE-2021-27664](https://insights.sbomify.com/CVE-2021-27664/): exacqVision Web Service (critical 9.8)
- [CVE-2024-32862](https://insights.sbomify.com/CVE-2024-32862/): exacqVision CORS (medium 6.8)
- [CVE-2024-32863](https://insights.sbomify.com/CVE-2024-32863/): exacqVison - CSRF issues with Web Service (medium 6.8)
- [CVE-2024-32864](https://insights.sbomify.com/CVE-2024-32864/): exacqVison - HTTPS Session Establishment (medium 6.4)
- [CVE-2024-32931](https://insights.sbomify.com/CVE-2024-32931/): exacqVison - Token Disclosed in URL (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27659 and fix it if it is affected.

What it is: CVE-2021-27659 is a medium-severity cross-site scripting vulnerability in Johnson Controls exacqVision Web Service, published on 24 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27659 in the wild and no public exploit code.

Affected product: Johnson Controls exacqVision Web Service. 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-2021-27659/ (Markdown: https://insights.sbomify.com/CVE-2021-27659/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27659
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27659
- OSV: https://osv.dev/vulnerability/CVE-2021-27659

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27659/
Summaries are generated and may contain mistakes; the official description above is the record.