{"cve":"CVE-2020-10776","nvd":{"published":"2020-11-17T02:15:11.910","modified":"2026-06-17T02:48:25.390","status":"Modified","description":"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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","score":4.8},"cwes":["CWE-79"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1847428","https://bugzilla.redhat.com/show_bug.cgi?id=1847428"],"products":["redhat:keycloak"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-10776","score":0.00778,"percentile":0.55898,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-484q-784p-8m5h","url":"https://osv.dev/vulnerability/GHSA-484q-784p-8m5h","summary":"Cross-site Scripting in keycloak","modified":"2024-04-22T20:02:33.122121Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-server-spi-private","purl":"pkg:maven/org.keycloak/keycloak-server-spi-private","ranges":["<12.0.0"],"fixed":["12.0.0"]},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","ranges":["<12.0.0"],"fixed":["12.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}