CVE-2020-10776

MEDIUMCVSS 4.8

4.8

A flaw was found in Keycloak before version 12.0.0, where it is possible to add unsafe schemes for the redirect_uri parameter. This flaw allows an attacker to perform a Cross-site scripting attack.

CVSS v3: 4.8
EG Score: —
EPSS: —
KEV: Not listed

Published

November 17, 2020

Last Modified

November 21, 2024

References (2)

secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=1847428
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1847428

Patch Availability(4)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	rh-sso7-keycloak-0:9.0.9-1.redhat_00001.1.el6sso	2020-11-04	redhat
redhat	rh-sso7-keycloak-0:9.0.9-1.redhat_00001.1.el7sso	2020-11-04	redhat
redhat	rh-sso7-libunix-dbus-java-0:0.8.0-2.el8sso	2020-11-04	redhat
redhat	patch	2020-11-04	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 1 ecosystem)

Maven(2)

Package	Vulnerable range	Fixed in	Dependents
org.keycloak:keycloak-server-spi-private	10.0.0 ... 9.0.3 (57 versions)	12.0.0	—
org.keycloak:keycloak-services	1.0-alpha-1 ... 9.0.3 (117 versions)	12.0.0	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-79Cross-site Scripting (XSS)

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 05:08 UTCEG score recompute
2026-05-23 05:08 UTCVendor advisory

Frequently asked(4)

What is CVE-2020-10776?

CVE-2020-10776 is a medium vulnerability published on November 17, 2020. A flaw was found in Keycloak before version 12.0.0, where it is possible to add unsafe schemes for the redirect_uri parameter. This flaw allows an attacker to perform a Cross-site scripting attack.

When was CVE-2020-10776 disclosed?

CVE-2020-10776 was first published in the National Vulnerability Database on November 17, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

What is the CVSS score of CVE-2020-10776?

CVE-2020-10776 has a CVSS v3 base score of 4.8 (NVD).

How do I remediate CVE-2020-10776?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-10776, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-10776

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