# CVE-2023-24427: Session fixation vulnerability in Jenkins Bitbucket OAuth Plugin

> Attackers can hijack user sessions because the plugin fails to invalidate previous sessions upon login, allowing unauthorized access to Jenkins accounts.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Jan 2023
- **Updated:** 2 Apr 2025
- **Also known as:** GHSA-x9q4-qwfh-9gjq

## What is CVE-2023-24427?

CVE-2023-24427 is a critical authentication bypass vulnerability in Jenkins Bitbucket OAuth Plugin, published on 24 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Jenkins Bitbucket OAuth Plugin 0.12 and earlier does not invalidate the previous session on login.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2023-24427?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:bitbucket-oauth. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jenkins-ci.plugins:bitbucket-oauth` | Maven | All versions | 0.13 |
| `org.jenkins-ci.plugins:bitbucket-oauth` | Maven | All versions | 0.13 |

Products: Jenkins Bitbucket Oauth.

## How do I fix CVE-2023-24427?

Upgrade org.jenkins-ci.plugins:bitbucket-oauth to 0.13 or later.

## Is CVE-2023-24427 being exploited?

There is no known exploitation of CVE-2023-24427 in the wild and no public exploit code.

## Other vulnerabilities in Jenkins Bitbucket OAuth Plugin

- [CVE-2019-10460](https://insights.sbomify.com/CVE-2019-10460/): Jenkins Bitbucket OAuth Plugin contains Insufficiently Protected Credentials (high 7.8)
- [CVE-2023-24428](https://insights.sbomify.com/CVE-2023-24428/): Cross-site request forgery vulnerability in Jenkins Bitbucket OAuth Plugin (medium 5.7)
- [CVE-2026-48924](https://insights.sbomify.com/CVE-2026-48924/): Jenkins Bitbucket OAuth Plugin does not restrict the redirect URL after login (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-24427 and fix it if it is affected.

What it is: CVE-2023-24427 is a critical authentication bypass vulnerability in Jenkins Bitbucket OAuth Plugin, published on 24 Jan 2023. 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-2023-24427 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jenkins-ci.plugins:bitbucket-oauth (Maven): affected all versions; fixed in 0.13
- org.jenkins-ci.plugins:bitbucket-oauth (Maven): affected all versions; fixed in 0.13

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-2023-24427/ (Markdown: https://insights.sbomify.com/CVE-2023-24427/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-24427
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-24427
- OSV: https://osv.dev/vulnerability/CVE-2023-24427

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-24427/
Summaries are generated and may contain mistakes; the official description above is the record.