# CVE-2026-0643: projectworlds House Rental and Property Listing Signup register.php unrestricted upload

> Attackers can upload malicious files via the signup form, potentially leading to remote code execution on the server.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jan 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-39j9-xxmr-pch7

## What is CVE-2026-0643?

CVE-2026-0643 is a medium-severity vulnerability in projectworlds House Rental and Property Listing, published on 6 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw has been found in projectworlds House Rental and Property Listing 1.0. Impacted is an unknown function of the file /app/register.php?action=reg of the component Signup. This manipulation of the argument image causes unrestricted upload. Remote exploitation of the attack is possible. The exploit has been published and may be used.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-0643?

It affects 1 product.


Products: Projectworlds House Rental and Property Listing Project.

## How do I fix CVE-2026-0643?

No fix has been published for CVE-2026-0643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0643 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0643 exists.

## Other vulnerabilities in projectworlds House Rental and Property Listing

- [CVE-2020-24202](https://insights.sbomify.com/CVE-2020-24202/): File upload in n/a (critical 9.8)
- [CVE-2026-1700](https://insights.sbomify.com/CVE-2026-1700/): projectworlds House Rental and Property Listing sms.php cross site scripting (medium 5.1)
- [CVE-2026-0642](https://insights.sbomify.com/CVE-2026-0642/): projectworlds House Rental and Property Listing complaint.php cross site scripting (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0643 and fix it if it is affected.

What it is: CVE-2026-0643 is a medium-severity vulnerability in projectworlds House Rental and Property Listing, published on 6 Jan 2026. 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-2026-0643 exists.

Affected product: projectworlds House Rental and Property Listing. 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-2026-0643/ (Markdown: https://insights.sbomify.com/CVE-2026-0643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0643
- OSV: https://osv.dev/vulnerability/CVE-2026-0643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0643/
Summaries are generated and may contain mistakes; the official description above is the record.