# CVE-2020-2254: Path traversal vulnerability in Blue Ocean Plugin

> An attacker with job configuration permissions can read arbitrary files on the Jenkins controller if an undocumented feature flag is enabled.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:** Yes
- **Published:** 16 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-vq7j-6pcq-f48p

## What is CVE-2020-2254?

CVE-2020-2254 is a medium-severity path traversal vulnerability in Jenkins Blue Ocean Plugin, published on 16 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Jenkins Blue Ocean Plugin 1.23.2 and earlier provides an undocumented feature flag that, when enabled, allows an attacker with Job/Configure or Job/Create permission to read arbitrary files on the Jenkins controller file system.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2020-2254?

2 open source packages ship an affected version, including io.jenkins.blueocean:blueocean. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `io.jenkins.blueocean:blueocean` | Maven | All versions | 1.23.3 |
| `io.jenkins.blueocean:blueocean` | Maven | All versions | 1.23.3 |

Products: Jenkins Blue Ocean.

## How do I fix CVE-2020-2254?

Upgrade io.jenkins.blueocean:blueocean to 1.23.3 or later.

## Is CVE-2020-2254 being exploited?

There is no known exploitation of CVE-2020-2254 in the wild and no public exploit code.

## Other vulnerabilities in Jenkins Blue Ocean Plugin

- [CVE-2023-40341](https://insights.sbomify.com/CVE-2023-40341/): Jenkins Blue Ocean Plugin cross-site request forgery vulnerability (high 8.8)
- [CVE-2017-1000106](https://insights.sbomify.com/CVE-2017-1000106/): Improper Authentication in Jenkins Blue Ocean Plugin (high 8.5)
- [CVE-2022-30952](https://insights.sbomify.com/CVE-2022-30952/): Insufficiently Protected Credentials in Jenkins Pipeline SCM API for Blue Ocean Plugin (medium 6.5)
- [CVE-2022-30953](https://insights.sbomify.com/CVE-2022-30953/): Cross Site Request Forgery in Jenkins Blue Ocean Plugin (medium 6.5)
- [CVE-2022-30954](https://insights.sbomify.com/CVE-2022-30954/): Missing permission check in Jenkins Blue Ocean Plugin (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-2254 and fix it if it is affected.

What it is: CVE-2020-2254 is a medium-severity path traversal vulnerability in Jenkins Blue Ocean Plugin, published on 16 Sep 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-2020-2254 in the wild and no public exploit code.

Affected packages and fixed versions:
- io.jenkins.blueocean:blueocean (Maven): affected all versions; fixed in 1.23.3
- io.jenkins.blueocean:blueocean (Maven): affected all versions; fixed in 1.23.3

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-2020-2254/ (Markdown: https://insights.sbomify.com/CVE-2020-2254/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-2254
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-2254
- OSV: https://osv.dev/vulnerability/CVE-2020-2254

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-2254/
Summaries are generated and may contain mistakes; the official description above is the record.