# CVE-2023-33968: Missing Access Control allows User to move and duplicate tasks in Kanboard

> Low-privilege users can move or duplicate tasks to unauthorized projects due to missing access control checks in Kanboard.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A: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:** 5 Jun 2023
- **Updated:** 8 Jan 2025
- **Also known as:** GHSA-gf8r-4p6m-v8vr

## What is CVE-2023-33968?

CVE-2023-33968 is a medium-severity missing authorization vulnerability in kanboard, published on 5 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Kanboard is open source project management software that focuses on the Kanban methodology. Versions prior to 1.2.30 are subject to a missing access control vulnerability that allows a user with low privileges to create or transfer tasks to any project within the software, even if they have not been invited or the project is personal. The vulnerable features are `Duplicate to project` and `Move to project`, which both utilize the `checkDestinationProjectValues()` function to check his values. This issue has been addressed in version 1.2.30. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2023-33968?

It affects 1 product.


Products: Kanboard Kanboard.

## How do I fix CVE-2023-33968?

No fix has been published for CVE-2023-33968 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-33968 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-33968 exists.

## Other vulnerabilities in kanboard

- [CVE-2026-21881](https://insights.sbomify.com/CVE-2026-21881/): Kanboard is Vulnerable to Reverse Proxy Authentication Bypass (critical 9.1)
- [CVE-2025-55010](https://insights.sbomify.com/CVE-2025-55010/): Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events (critical 9.1)
- [CVE-2024-51747](https://insights.sbomify.com/CVE-2024-51747/): Arbitrary File Read and Delete in kanboard (critical 9.1)
- [CVE-2024-51748](https://insights.sbomify.com/CVE-2024-51748/): Remote code execution through language setting in kanboard (critical 9.1)
- [CVE-2017-12850](https://insights.sbomify.com/CVE-2017-12850/): Business logic in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-33968 and fix it if it is affected.

What it is: CVE-2023-33968 is a medium-severity missing authorization vulnerability in kanboard, published on 5 Jun 2023. 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-2023-33968 exists.

Affected product: kanboard. 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-2023-33968/ (Markdown: https://insights.sbomify.com/CVE-2023-33968/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-33968
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-33968
- OSV: https://osv.dev/vulnerability/CVE-2023-33968

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-33968/
Summaries are generated and may contain mistakes; the official description above is the record.