# CVE-2023-4821: Drag and Drop Multiple File Upload < 1.1.1 - Unauthenticated Stored Cross-Site Scripting

> Unauthenticated attackers can upload malicious SVG or SHTML files to execute scripts in victim browsers via stored XSS.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 Oct 2023
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-9c5w-974x-xjxh

## What is CVE-2023-4821?

CVE-2023-4821 is a medium-severity cross-site scripting vulnerability in Unknown Drag and Drop Multiple File Upload for WooCommerce, published on 16 Oct 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Drag and Drop Multiple File Upload for WooCommerce WordPress plugin before 1.1.1 does not filter all potentially dangerous file extensions. Therefore, an attacker can upload unsafe .shtml or .svg files containing malicious scripts.

## Which versions are affected by CVE-2023-4821?

It affects 1 product.


Products: Codedropz Drag and Drop Multiple File Uploader.

## How do I fix CVE-2023-4821?

No fix has been published for CVE-2023-4821 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4821 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4821 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4821 and fix it if it is affected.

What it is: CVE-2023-4821 is a medium-severity cross-site scripting vulnerability in Unknown Drag and Drop Multiple File Upload for WooCommerce, published on 16 Oct 2023. Any signed-in user can exploit it over the network, 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-2023-4821 exists.

Affected product: Unknown Drag and Drop Multiple File Upload for WooCommerce. 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-2023-4821/ (Markdown: https://insights.sbomify.com/CVE-2023-4821/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4821
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4821
- OSV: https://osv.dev/vulnerability/CVE-2023-4821

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4821/
Summaries are generated and may contain mistakes; the official description above is the record.