# CVE-2023-53950: InnovaStudio WYSIWYG Editor 5.4 Unrestricted File Upload via Filename Manipulation

> Attackers can upload malicious ASP shells by bypassing file extension restrictions in the asset manager, leading to remote code execution.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Dec 2025
- **Updated:** 14 May 2026
- **Also known as:** GHSA-cjf9-p6jj-3g6r

## What is CVE-2023-53950?

CVE-2023-53950 is a critical vulnerability in innovastudio WYSIWYG Editor, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

InnovaStudio WYSIWYG Editor 5.4 contains an unrestricted file upload vulnerability that allows attackers to bypass file extension restrictions through filename manipulation. Attackers can upload malicious ASP shells by using null byte techniques and alternate file extensions to circumvent upload controls in the asset manager.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2023-53950?


## How do I fix CVE-2023-53950?

No fix has been published for CVE-2023-53950 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-53950 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53950 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-53950 and fix it if it is affected.

What it is: CVE-2023-53950 is a critical vulnerability in innovastudio WYSIWYG Editor, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53950 exists.

Affected product: innovastudio WYSIWYG Editor. 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-2023-53950/ (Markdown: https://insights.sbomify.com/CVE-2023-53950/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-53950
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-53950
- OSV: https://osv.dev/vulnerability/CVE-2023-53950

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-53950/
Summaries are generated and may contain mistakes; the official description above is the record.