{"cve":"CVE-2020-1957","nvd":{"published":"2020-03-25T16:15:19.353","modified":"2026-06-17T03:02:43.240","status":"Modified","description":"Apache Shiro before 1.5.2, when using Apache Shiro with Spring dynamic controllers, a specially crafted request may cause an authentication bypass.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://lists.apache.org/thread.html/r17f371fc89d34df2d0c8131473fbc68154290e1be238895648f5a1e6%40%3Cdev.shiro.apache.org%3E","https://lists.apache.org/thread.html/r2d2612c034ab21a3a19d2132d47d3e4aa70105008dd58af62b653040%40%3Ccommits.shiro.apache.org%3E","https://lists.apache.org/thread.html/rab1972d6b177f7b5c3dde9cfb0a40f03bca75f0eaf1d8311e5762cb3%40%3Ccommits.shiro.apache.org%3E","https://lists.apache.org/thread.html/rb3982edf8bc8fcaa7a308e25a12d294fb4aac1f1e9d4e14fda639e77%40%3Cdev.geode.apache.org%3E","https://lists.apache.org/thread.html/rc64fb2336683feff3580c3c3a8b28e80525077621089641f2f386b63%40%3Ccommits.camel.apache.org%3E"],"products":["apache:shiro","debian:debian_linux"],"source":"nvd","synced_at":"2026-10-19T21:03:08.679916934+00:00"},"epss":{"cve":"CVE-2020-1957","score":0.23326,"percentile":0.97781,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-26gr-cvq3-qxgf","url":"https://osv.dev/vulnerability/GHSA-26gr-cvq3-qxgf","summary":"Improper Authentication in Apache Shiro","modified":"2023-11-08T04:02:47.183256Z","packages":[{"ecosystem":"Maven","name":"org.apache.shiro:shiro-core","purl":"pkg:maven/org.apache.shiro/shiro-core","ranges":["<1.5.2"],"fixed":["1.5.2"]}]}],"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."]}