{"id":"CVE-2021-31923","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-31923","generatedAt":"2026-10-27T21:20:21.731Z","title":"Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.","description":"Ping Identity PingAccess before 5.3.3 allows HTTP request smuggling via header manipulation.","published":"2021-09-24T03:15:06.000Z","lastModified":"2026-06-17T03:52:30.000Z","status":"Modified","sourceIdentifier":"responsible-disclosure@pingidentity.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-444"],"affected":["pingidentity/pingaccess"],"epss":{"score":0.00708,"percentile":0.53195,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.71%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://docs.pingidentity.com/bundle/pingaccess-53/page/wco1629833104567.html","source":"responsible-disclosure@pingidentity.com"},{"url":"https://docs.pingidentity.com/bundle/pingaccess-53/page/wco1629833104567.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-31923","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}