{"id":"CVE-2019-17563","aliases":["GHSA-9xcj-c8cr-8c3c"],"url":"https://o3.security/vulnerability/CVE-2019-17563","summary":"In Apache Tomcat, when using FORM authentication there was a narrow window where an attacker could perform a session fixation attack","details":"When using FORM authentication with Apache Tomcat 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49 and 7.0.0 to 7.0.98 there was a narrow window where an attacker could perform a session fixation attack. The window was considered too narrow for an exploit to be practical but, erring on the side of caution, this issue has been treated as a security vulnerability.","published":"2019-12-23T17:15:11.803Z","modified":"2026-08-07T08:12:01.100035346Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"7.0.99"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"8.5.50"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"9.0.30"}],"fix":null,"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e%40%3Cissues.cxf.apache.org%3E"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html"},{"type":"ADVISORY","url":"https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html"},{"type":"ADVISORY","url":"https://seclists.org/bugtraq/2019/Dec/43"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202003-43"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200107-0001/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4251-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4596"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4680"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2020.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2021.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujul2020.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T08:12:01.100035346Z"}}