{"id":"CVE-2020-1957","aliases":["GHSA-26gr-cvq3-qxgf"],"url":"https://o3.security/vulnerability/CVE-2020-1957","summary":"Improper Authentication in Apache Shiro","details":"Apache Shiro before 1.5.2, when using Apache Shiro with Spring dynamic controllers, a specially crafted request may cause an authentication bypass.","published":"2020-03-25T16:15:19.353Z","modified":"2026-07-08T05:53:41.848025320Z","cvss":{"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"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.shiro:shiro-core","fixedVersion":"1.5.2"}],"fix":null,"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r2d2612c034ab21a3a19d2132d47d3e4aa70105008dd58af62b653040%40%3Ccommits.shiro.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rab1972d6b177f7b5c3dde9cfb0a40f03bca75f0eaf1d8311e5762cb3%40%3Ccommits.shiro.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rb3982edf8bc8fcaa7a308e25a12d294fb4aac1f1e9d4e14fda639e77%40%3Cdev.geode.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc64fb2336683feff3580c3c3a8b28e80525077621089641f2f386b63%40%3Ccommits.camel.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc8b39ea8b3ef71ddc1cd74ffc866546182683c8adecf19c263fe7ac0%40%3Ccommits.shiro.apache.org%3E"},{"type":"ADVISORY","url":"https://lists.apache.org/thread.html/r17f371fc89d34df2d0c8131473fbc68154290e1be238895648f5a1e6%40%3Cdev.shiro.apache.org%3E"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/04/msg00014.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:53:41.848025320Z"}}