# CVE-2020-36705: Adning Advertising <= 1.5.5 - Arbitrary File Upload

> Unauthenticated attackers can upload arbitrary files via the Adning Advertising 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:** 7 Jun 2023
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-mjvv-fcgj-hpr2

## What is CVE-2020-36705?

CVE-2020-36705 is a critical vulnerability in tunafish Adning Advertising, published on 7 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Adning Advertising plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the _ning_upload_image function in versions up to, and including, 1.5.5. This makes it possible for unauthenticated 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-2020-36705?

It affects 1 product.


Products: Tunasite Adning Advertising.

## How do I fix CVE-2020-36705?

No fix has been published for CVE-2020-36705 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36705 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36705 exists.

Public exploit code:

- Adning Advertising <= 1.5.5 - Arbitrary File Upload (nuclei): http/cves/2020/CVE-2020-36705.yaml

## Other vulnerabilities in tunafish Adning Advertising

- [CVE-2020-36728](https://insights.sbomify.com/CVE-2020-36728/): Adning Advertising <= 1.5.5 - Unauthenticated Arbitrary File Deletion via Path Traversal (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36705 and fix it if it is affected.

What it is: CVE-2020-36705 is a critical vulnerability in tunafish Adning Advertising, published on 7 Jun 2023. 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-2020-36705 exists.

Affected product: tunafish Adning Advertising. 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-2020-36705/ (Markdown: https://insights.sbomify.com/CVE-2020-36705/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36705
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36705
- OSV: https://osv.dev/vulnerability/CVE-2020-36705

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36705/
Summaries are generated and may contain mistakes; the official description above is the record.