# CVE-2023-0643: Improper Handling of Additional Special Element in squidex/squidex


- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 2 Feb 2023
- **Updated:** 26 Mar 2025
- **Also known as:** GHSA-4g2g-8pcm-99w8

## What is CVE-2023-0643?

CVE-2023-0643 is a medium-severity vulnerability in squidex/squidex, published on 2 Feb 2023. 

### Official description

Improper Handling of Additional Special Element in GitHub repository squidex/squidex prior to 7.4.0.

Weakness: CWE-167 (Improper Handling of Additional Special Element)

## Which versions are affected by CVE-2023-0643?

It affects 1 product.


Products: Squidex.io Squidex.

## How do I fix CVE-2023-0643?

No fix has been published for CVE-2023-0643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0643 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0643 exists.

## Other vulnerabilities in squidex/squidex

- [CVE-2026-24736](https://insights.sbomify.com/CVE-2026-24736/): Squidex has Server-Side Request Forgery (SSRF) Issue in Webhook Configuration (critical 9.1)
- [CVE-2023-46253](https://insights.sbomify.com/CVE-2023-46253/): Remote code execution in Squidex (critical 9.1)
- [CVE-2023-46252](https://insights.sbomify.com/CVE-2023-46252/): Cross-Site Scripting (XSS) via postMessage Handler in Squidex (medium 6.8)
- [CVE-2023-0642](https://insights.sbomify.com/CVE-2023-0642/): Cross-Site Request Forgery (CSRF) in squidex/squidex (medium 6.8)
- [CVE-2023-24278](https://insights.sbomify.com/CVE-2023-24278/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0643 and fix it if it is affected.

What it is: CVE-2023-0643 is a medium-severity vulnerability in squidex/squidex, published on 2 Feb 2023. 
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0643 exists.

Affected product: squidex/squidex. 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-2023-0643/ (Markdown: https://insights.sbomify.com/CVE-2023-0643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0643
- OSV: https://osv.dev/vulnerability/CVE-2023-0643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0643/
Summaries are generated and may contain mistakes; the official description above is the record.