CVE-2020-10770

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 69.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-12-15 · updated 2026-06-17
Weakness: CWE-918

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.

Affected products

Keycloak: before 12.0.2 — fixed in 12.0.2

How to fix

Upgrade to a fixed version: Keycloak 12.0.2. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html
https://bugzilla.redhat.com/show_bug.cgi?id=1846270
http://packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html
https://bugzilla.redhat.com/show_bug.cgi?id=1846270

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