# CVE-2020-10734: OIDC Logout redirect in keycloak

> Attackers can force authenticated users to log out via CSRF, disrupting sessions in Keycloak identity management systems.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Feb 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rvjg-gxwx-j5gf

## What is CVE-2020-10734?

CVE-2020-10734 is a low-severity vulnerability in Redhat Keycloak, published on 11 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was found in keycloak in the way that the OIDC logout endpoint does not have CSRF protection. Versions shipped with Red Hat Fuse 7, Red Hat Single Sign-on 7, and Red Hat Openshift Application Runtimes are believed to be vulnerable.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2020-10734?

2 open source packages ship an affected version, including org.keycloak:keycloak-oidc-client-adapter-pom. It affects 4 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.keycloak:keycloak-oidc-client-adapter-pom` | Maven | All versions | 18.0.0 |
| `org.keycloak:keycloak-oidc-client-adapter-pom` | Maven | All versions | 18.0.0 |

Products: Redhat Jboss Fuse, Redhat Keycloak, Redhat Openshift Application Runtimes, Redhat Single Sign-On.

## How do I fix CVE-2020-10734?

Upgrade org.keycloak:keycloak-oidc-client-adapter-pom to 18.0.0 or later.

## Is CVE-2020-10734 being exploited?

There is no known exploitation of CVE-2020-10734 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Keycloak

- [CVE-2020-27782](https://insights.sbomify.com/CVE-2020-27782/): Denial of service in Undertow (high 7.5)
- [CVE-2020-10718](https://insights.sbomify.com/CVE-2020-10718/): Security feature bypass in Wildfly (high 7.5)
- [CVE-2020-1718](https://insights.sbomify.com/CVE-2020-1718/): Improper Authentication for Keycloak (high 7.1)
- [CVE-2016-1000229](https://insights.sbomify.com/CVE-2016-1000229/): Improper Neutralization of Input During Web Page Generation in swagger-ui (medium 6.1)
- [CVE-2014-8175](https://insights.sbomify.com/CVE-2014-8175/): Auth bypass in n/a (medium 6.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10734 and fix it if it is affected.

What it is: CVE-2020-10734 is a low-severity vulnerability in Redhat Keycloak, published on 11 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-10734 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.keycloak:keycloak-oidc-client-adapter-pom (Maven): affected all versions; fixed in 18.0.0
- org.keycloak:keycloak-oidc-client-adapter-pom (Maven): affected all versions; fixed in 18.0.0

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-2020-10734/ (Markdown: https://insights.sbomify.com/CVE-2020-10734/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10734
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10734
- OSV: https://osv.dev/vulnerability/CVE-2020-10734

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-10734/
Summaries are generated and may contain mistakes; the official description above is the record.