# CVE-2025-1391: Keycloak-services: improper authorization in keycloak organization mapper allows unauthorized organization claims

> Attackers can gain unauthorized organization privileges by matching domain patterns, leading to incorrect access control decisions in applications relying on Keycloak tokens.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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:** 17 Feb 2025
- **Updated:** 21 Sep 2026
- **Also known as:** ECHO-b87a-6495-4598, GHSA-gvgg-2r3r-53x7

## What is CVE-2025-1391?

CVE-2025-1391 is a medium-severity missing authorization vulnerability in Red Hat Build of Keycloak, published on 17 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in the Keycloak organization feature, which allows the incorrect assignment of an organization to a user if their username or email matches the organization’s domain pattern. This issue occurs at the mapper level, leading to misrepresentation in tokens. If an application relies on these claims for authorization, it may incorrectly assume a user belongs to an organization they are not a member of, potentially granting unauthorized access or privileges.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2025-1391?

4 open source packages ship an affected version, including org.keycloak:keycloak-services.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.keycloak:keycloak-services` | Maven | All versions | 26.0.10 |
| `org.keycloak:keycloak-services` | Maven | All versions | 26.0.10 |
| `org.keycloak:keycloak-services` | Maven | From 26.1.0 | 26.1.3 |
| `org.keycloak:keycloak-services` | Maven | From 26.1.0 | 26.1.3 |

## How do I fix CVE-2025-1391?

Upgrade org.keycloak:keycloak-services to a fixed version for your release line: 26.0.10 or 26.1.3.

## Is CVE-2025-1391 being exploited?

There is no known exploitation of CVE-2025-1391 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-1391 and fix it if it is affected.

What it is: CVE-2025-1391 is a medium-severity missing authorization vulnerability in Red Hat Build of Keycloak, published on 17 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-1391 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.keycloak:keycloak-services (Maven): affected all versions; fixed in 26.0.10
- org.keycloak:keycloak-services (Maven): affected all versions; fixed in 26.0.10
- org.keycloak:keycloak-services (Maven): affected from 26.1.0; fixed in 26.1.3
- org.keycloak:keycloak-services (Maven): affected from 26.1.0; fixed in 26.1.3

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-2025-1391/ (Markdown: https://insights.sbomify.com/CVE-2025-1391/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-1391
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-1391
- OSV: https://osv.dev/vulnerability/CVE-2025-1391

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-1391/
Summaries are generated and may contain mistakes; the official description above is the record.