# CVE-2020-36849: AIT CSV import/export <= 3.0.3 - Unauthenticated Arbitrary File Upload

> Unauthenticated attackers can upload arbitrary files via the AIT CSV import/export plugin, potentially leading to remote code execution on the server.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Jul 2025
- **Updated:** 8 Apr 2026
- **Also known as:** CVE-2025-34083, GHSA-p27j-qf57-7cm7

## What is CVE-2020-36849?

CVE-2020-36849 is a critical vulnerability in AIT CSV import/export, published on 12 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The AIT CSV import/export plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the /wp-content/plugins/ait-csv-import-export/admin/upload-handler.php file in versions up to, and including, 3.0.3. This makes it possible for unauthorized attackers to upload arbitrary files on the affected sites server which may make remote code execution possible.

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

## Which versions are affected by CVE-2020-36849?

It affects 1 product.


Products: Ait-Themes Csv Import \/ Export.

## How do I fix CVE-2020-36849?

No fix has been published for CVE-2020-36849 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36849 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36849 exists.

Public exploit code:

- WordPress AIT CSV Import Export Unauthenticated Remote Code Execution (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36849 and fix it if it is affected.

What it is: CVE-2020-36849 is a critical vulnerability in AIT CSV import/export, published on 12 Jul 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-2020-36849 exists.

Affected product: AIT CSV import/export. 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-2020-36849/ (Markdown: https://insights.sbomify.com/CVE-2020-36849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36849
- OSV: https://osv.dev/vulnerability/CVE-2020-36849

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-36849/
Summaries are generated and may contain mistakes; the official description above is the record.