{"cve":"CVE-2021-20323","nvd":{"published":"2022-03-25T19:15:08.560","modified":"2026-06-17T03:33:40.447","status":"Modified","description":"A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=2013577","https://bugzilla.redhat.com/show_bug.cgi?id=2013577"],"products":["redhat:keycloak"],"source":"nvd","synced_at":"2026-10-19T21:29:06.454770966+00:00"},"epss":{"cve":"CVE-2021-20323","score":0.37246,"percentile":0.98524,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xpgc-j48j-jwv9","url":"https://osv.dev/vulnerability/GHSA-xpgc-j48j-jwv9","summary":"Cross-site Scripting in Keycloak","modified":"2023-11-08T04:04:37.052063Z","packages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-core","purl":"pkg:maven/org.keycloak/keycloak-core","ranges":[">=15.0.0 <17.0.0"],"fixed":["17.0.0"]}]}],"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."]}