# CVE-2020-5643: Missing authorization in Cybozu Garoon

> Remote authenticated attackers can delete bulletin board data due to improper input validation in Cybozu Garoon.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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:** 6 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7h2q-73jh-4hcv

## What is CVE-2020-5643?

CVE-2020-5643 is a medium-severity missing authorization vulnerability in Cybozu Garoon, published on 6 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper input validation vulnerability in Cybozu Garoon 5.0.0 to 5.0.2 allows a remote authenticated attacker to delete some data of the bulletin board via unspecified vector.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-5643?

It affects 1 product.


Products: Cybozu Garoon.

## How do I fix CVE-2020-5643?

No fix has been published for CVE-2020-5643 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5643 being exploited?

There is no known exploitation of CVE-2020-5643 in the wild and no public exploit code.

## Other vulnerabilities in Cybozu Garoon

- [CVE-2014-1987](https://insights.sbomify.com/CVE-2014-1987/): Command injection in n/a (critical 10.0)
- [CVE-2019-5945](https://insights.sbomify.com/CVE-2019-5945/): Information disclosure in Cybozu Garoon (critical 9.8)
- [CVE-2016-1219](https://insights.sbomify.com/CVE-2016-1219/): Auth bypass in n/a (critical 9.8)
- [CVE-2024-31401](https://insights.sbomify.com/CVE-2024-31401/): Cross-site scripting in Cybozu Garoon (critical 9.0)
- [CVE-2018-0607](https://insights.sbomify.com/CVE-2018-0607/): SQL injection in Cybozu Garoon (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5643 and fix it if it is affected.

What it is: CVE-2020-5643 is a medium-severity missing authorization vulnerability in Cybozu Garoon, published on 6 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-5643 in the wild and no public exploit code.

Affected product: Cybozu Garoon. 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-2020-5643/ (Markdown: https://insights.sbomify.com/CVE-2020-5643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5643
- OSV: https://osv.dev/vulnerability/CVE-2020-5643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5643/
Summaries are generated and may contain mistakes; the official description above is the record.