{"cve":"CVE-2020-17523","nvd":{"published":"2021-02-03T17:15:13.700","modified":"2026-06-17T02:59:04.707","status":"Modified","description":"Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP 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":["CWE-287"],"references":["https://lists.apache.org/thread.html/r5b93ddf97e2c4cda779d22fab30539bdec454cfa5baec4ad0ffae235%40%3Cgitbox.activemq.apache.org%3E","https://lists.apache.org/thread.html/r679ca97813384bdb1a4c087810ba44d9ad9c7c11583979bb7481d196%40%3Cdev.shiro.apache.org%3E","https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd%40%3Cusers.activemq.apache.org%3E","https://lists.apache.org/thread.html/r852971e28f54cafa7d325bd7033115c67d613b112a2a1076817390ac%40%3Cdev.shiro.apache.org%3E","https://lists.apache.org/thread.html/r9d93dfb5df016b1a71a808486bc8f9fbafebbdbc8533625f91253f1d%40%3Cdev.shiro.apache.org%3E"],"products":["apache:shiro"],"source":"nvd","synced_at":"2026-10-19T21:14:10.479542811+00:00"},"epss":{"cve":"CVE-2020-17523","score":0.85911,"percentile":0.99729,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v98j-7crc-wvrj","url":"https://osv.dev/vulnerability/GHSA-v98j-7crc-wvrj","summary":"Authentication bypass in Apache Shiro","modified":"2023-11-08T04:02:42.580112Z","packages":[{"ecosystem":"Maven","name":"org.apache.shiro:shiro-web","purl":"pkg:maven/org.apache.shiro/shiro-web","ranges":["<1.7.1"],"fixed":["1.7.1"]},{"ecosystem":"Maven","name":"org.apache.shiro:shiro-spring","purl":"pkg:maven/org.apache.shiro/shiro-spring","ranges":["<1.7.1"],"fixed":["1.7.1"]},{"ecosystem":"Maven","name":"org.apache.shiro:shiro-spring-boot-starter","purl":"pkg:maven/org.apache.shiro/shiro-spring-boot-starter","ranges":["<1.7.1"],"fixed":["1.7.1"]}]}],"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."]}