# GHSA-m98g-63qj-fp8j: Reflected XSS on clients-registrations endpoint

> Attackers can execute malicious scripts in user browsers via unescaped error messages in the client registration endpoint.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 28 Apr 2022

## What is GHSA-m98g-63qj-fp8j?

GHSA-m98g-63qj-fp8j is a cross-site scripting vulnerability in org.keycloak:keycloak-parent, published on 28 Apr 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak. When a malicious request is sent to the client registration endpoint, the error message is not properly escaped, allowing an attacker to execute malicious scripts into the user's browser.

### Acknowledgement

Keycloak would like to thank Quentin TEXIER (Pentester at Opencyber) for reporting this issue.

## Which versions are affected by GHSA-m98g-63qj-fp8j?

2 open source packages ship an affected version, including org.keycloak:keycloak-parent.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.keycloak:keycloak-parent` | Maven | From 10.0.0 | 18.0.0 |
| `org.keycloak:keycloak-parent` | Maven | From 10.0.0 | 18.0.0 |

## How do I fix GHSA-m98g-63qj-fp8j?

Upgrade org.keycloak:keycloak-parent to 18.0.0 or later.

## Is GHSA-m98g-63qj-fp8j being exploited?

There is no known exploitation of GHSA-m98g-63qj-fp8j in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-m98g-63qj-fp8j and fix it if it is affected.

What it is: GHSA-m98g-63qj-fp8j is a cross-site scripting vulnerability in org.keycloak:keycloak-parent, published on 28 Apr 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of GHSA-m98g-63qj-fp8j in the wild and no public exploit code.

Affected packages and fixed versions:
- org.keycloak:keycloak-parent (Maven): affected from 10.0.0; fixed in 18.0.0
- org.keycloak:keycloak-parent (Maven): affected from 10.0.0; 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/GHSA-m98g-63qj-fp8j/ (Markdown: https://insights.sbomify.com/GHSA-m98g-63qj-fp8j/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-m98g-63qj-fp8j

---
From sbomify Insights: https://insights.sbomify.com/GHSA-m98g-63qj-fp8j/
Summaries are generated and may contain mistakes; the official description above is the record.