# CVE-2020-21786: File upload in n/a

> Arbitrary file inclusion in IBOS allows attackers to upload malicious files and execute code via the dashboard controller.

- **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:** 24 Jun 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-pj38-fjfr-xp7q

## What is CVE-2020-21786?

CVE-2020-21786 is a critical vulnerability in n/a, published on 24 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In IBOS 4.5.4 Open, Arbitrary File Inclusion causes getshell via /system/modules/dashboard/controllers/CronController.php.

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

## Which versions are affected by CVE-2020-21786?

It affects 1 product.


Products: Ibos Ibos.

## How do I fix CVE-2020-21786?

No fix has been published for CVE-2020-21786 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-21786 being exploited?

There is no known exploitation of CVE-2020-21786 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-28265](https://insights.sbomify.com/CVE-2024-28265/): Path traversal in n/a (critical 9.1)
- [CVE-2020-21785](https://insights.sbomify.com/CVE-2020-21785/): In IBOS 4.5.4 Open, the database backup has Command Injection Vulnerability. (high 8.8)
- [CVE-2023-4849](https://insights.sbomify.com/CVE-2023-4849/): IBOS OA trash&op=del sql injection (medium 6.3)
- [CVE-2023-4850](https://insights.sbomify.com/CVE-2023-4850/): IBOS OA del sql injection (medium 6.3)
- [CVE-2023-4851](https://insights.sbomify.com/CVE-2023-4851/): IBOS OA edit&op=member sql injection (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-21786 and fix it if it is affected.

What it is: CVE-2020-21786 is a critical vulnerability in n/a, published on 24 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-21786 in the wild and no public exploit code.

Affected product: n/a. 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-2020-21786/ (Markdown: https://insights.sbomify.com/CVE-2020-21786/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-21786
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-21786
- OSV: https://osv.dev/vulnerability/CVE-2020-21786

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-21786/
Summaries are generated and may contain mistakes; the official description above is the record.