# CVE-2018-16178: Auth bypass in Cybozu Garoon

> Remote attackers can bypass access restrictions to view user-specific information via the Single sign-on function in Cybozu Garoon.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jan 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-98q7-7xrc-jv76

## What is CVE-2018-16178?

CVE-2018-16178 is a high-severity authentication bypass vulnerability in Cybozu Garoon, published on 9 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cybozu Garoon 3.0.0 to 4.10.0 allows remote attackers to bypass access restriction to view information available only for a sign-on user via Single sign-on function.

## Which versions are affected by CVE-2018-16178?

It affects 1 product.


Products: Cybozu Garoon.

## How do I fix CVE-2018-16178?

No fix has been published for CVE-2018-16178 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16178 being exploited?

There is no known exploitation of CVE-2018-16178 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-2018-16178 and fix it if it is affected.

What it is: CVE-2018-16178 is a high-severity authentication bypass vulnerability in Cybozu Garoon, published on 9 Jan 2019. 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-2018-16178 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-2018-16178/ (Markdown: https://insights.sbomify.com/CVE-2018-16178/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16178
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16178
- OSV: https://osv.dev/vulnerability/CVE-2018-16178

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16178/
Summaries are generated and may contain mistakes; the official description above is the record.