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Fencer Vulns
medium 6.1

CVE-2020-1723 json

A flaw was found in Keycloak Gatekeeper (Louketo).

published 2021-01-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-12574

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

A flaw was found in Keycloak Gatekeeper (Louketo). The logout endpoint can be abused to redirect logged-in users to arbitrary web pages. Affected versions of Keycloak Gatekeeper (Louketo): 6.0.1, 7.0.0

Patch / fix

  • keycloak Arch Linux 16.0.0-1

arch linux advisories AVG-1332

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-1723 updated cvss 4.3

keycloak: logout endpoint /oauth/logout?redirect=url can be abused to redirect logged in users to arbitrary web pages

  • Red Hat Mobile Application Platform 4 keycloak
    affected: no fix planned “Out of support scope”
  • Red Hat Fuse 7 keycloak keycloak Red Hat OpenShift Application Runtimes keycloak keycloak Red Hat Single Sign-On 7 rh-sso7-keycloak rh-sso7-keycloak
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.01% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

  • Louketo Keycloak Gatekeeper

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.