# CVE-2023-53930: ProjectSend r1605 Insecure Direct Object Reference File Download Vulnerability

> Unauthenticated attackers can download private files by manipulating the ID parameter in ProjectSend, exposing sensitive user data.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Dec 2025
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-gc6r-xc3x-9vvg

## What is CVE-2023-53930?

CVE-2023-53930 is a high-severity missing authorization vulnerability in projectSend, published on 17 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

ProjectSend r1605 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to download private files by manipulating the download ID parameter. Attackers can access any user's private files by changing the 'id' parameter in the download request to process.php.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2023-53930?

It affects 1 product.


Products: Projectsend Projectsend.

## How do I fix CVE-2023-53930?

No fix has been published for CVE-2023-53930 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-53930 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53930 exists.

## Other vulnerabilities in projectSend

- [CVE-2024-11680](https://insights.sbomify.com/CVE-2024-11680/): ProjectSend Improper Authentication (critical 9.8, exploited in the wild)
- [CVE-2021-40887](https://insights.sbomify.com/CVE-2021-40887/): Path traversal in n/a (critical 9.8)
- [CVE-2016-10731](https://insights.sbomify.com/CVE-2016-10731/): SQL injection in n/a (critical 9.8)
- [CVE-2016-10732](https://insights.sbomify.com/CVE-2016-10732/): Auth bypass in n/a (critical 9.8)
- [CVE-2016-10733](https://insights.sbomify.com/CVE-2016-10733/): Path traversal in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-53930 and fix it if it is affected.

What it is: CVE-2023-53930 is a high-severity missing authorization vulnerability in projectSend, published on 17 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53930 exists.

Affected product: projectSend. 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-2023-53930/ (Markdown: https://insights.sbomify.com/CVE-2023-53930/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-53930
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-53930
- OSV: https://osv.dev/vulnerability/CVE-2023-53930

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-53930/
Summaries are generated and may contain mistakes; the official description above is the record.