{"schemaVersion":3,"id":"UBUNTU-CVE-2021-41303","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Apache Shiro before 1.8.0, when using Apache Shiro with Spring Boot, a specially crafted HTTP request may cause an authentication bypass. Users should update to Apache Shiro 1.8.0.","dates":{"published":"2021-09-17T09:15:00.000Z","modified":"2026-02-04T04:32:28.710Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":true,"selection":"version-preference"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"shiro","name":"shiro","label":"shiro","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/shiro","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/CVE-2021-41303","label":"ubuntu.com/security/CVE-2021-41303","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.openwall.com/lists/oss-security/2021/09/17/1","label":"www.openwall.com/lists/oss-security/2021/09/17/1","hostname":"www.openwall.com","tags":["REPORT"]},{"url":"https://lists.apache.org/thread.html/re470be1ffea44bca28ccb0e67a4cf5d744e2d2b981d00fdbbf5abc13%40%3Cannounce.shiro.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-41303","label":"www.cve.org/CVERecord?id=CVE-2021-41303","hostname":"www.cve.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2021-41303"]},"timeline":[{"kind":"published","date":"2021-09-17T09:15:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-04T04:32:28.710Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T13:50:55.584Z","stale":false,"partial":false}}