--- id: CVE-2019-17563 title: >- 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 summary: >- 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 ex… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H' cwe: - CWE-384 vendor: apache product: tomcat affected: - 'tomcat >= 7.0.0, <= 7.0.98' - 'tomcat >= 8.5.0, <= 8.5.49' - 'tomcat >= 9.0.0, <= 9.0.29' - debian_linux = 8.0 - debian_linux = 9.0 - debian_linux = 10.0 - leap = 15.1 - ubuntu_linux = 16.04 - agile_engineering_data_management = 6.2.1.0 - hyperion_infrastructure_technology = 11.1.2.4 - 'instantis_enterprisetrack >= 17.1, <= 17.3' - micros_relate_crm_software = 11.4 - mysql_enterprise_monitor <= 4.0.11.5331 - 'mysql_enterprise_monitor >= 8.0.0, <= 8.0.18.1217' - retail_order_broker = 15.0 - transportation_management = 6.3.7 published: '2019-12-23' updated: '2026-10-08' sourceUpdated: '2026-10-08T21:17:17.253' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-17563' references: - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html' label: security@apache.org - url: >- https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E label: security@apache.org - url: >- https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E label: security@apache.org - url: >- https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E label: security@apache.org - url: >- https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E label: security@apache.org - url: >- https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E label: security@apache.org - url: >- https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E label: security@apache.org - url: >- https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e%40%3Cissues.cxf.apache.org%3E label: security@apache.org - url: 'https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html' label: security@apache.org - url: 'https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html' label: security@apache.org - url: 'https://seclists.org/bugtraq/2019/Dec/43' label: security@apache.org - url: 'https://security.gentoo.org/glsa/202003-43' label: security@apache.org - url: 'https://security.netapp.com/advisory/ntap-20200107-0001/' label: security@apache.org - url: 'https://usn.ubuntu.com/4251-1/' label: security@apache.org - url: 'https://www.debian.org/security/2019/dsa-4596' label: security@apache.org - url: 'https://www.debian.org/security/2020/dsa-4680' label: security@apache.org - url: 'https://www.oracle.com/security-alerts/cpuapr2020.html' label: security@apache.org - url: 'https://www.oracle.com/security-alerts/cpujan2021.html' label: security@apache.org - url: 'https://www.oracle.com/security-alerts/cpujul2020.html' label: security@apache.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e%40%3Cissues.cxf.apache.org%3E label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://seclists.org/bugtraq/2019/Dec/43' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.gentoo.org/glsa/202003-43' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.netapp.com/advisory/ntap-20200107-0001/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://usn.ubuntu.com/4251-1/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2019/dsa-4596' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2020/dsa-4680' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpuapr2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpujan2021.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpujul2020.html' label: af854a3a-2127-422b-91ae-364da2661108 tags: - nvd epss: 0.10687 epssPercentile: 0.95707 ingestedAt: '2026-10-08T22:11:53.708Z' --- ## Overview 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. ## Affected - `tomcat >= 7.0.0, <= 7.0.98` - `tomcat >= 8.5.0, <= 8.5.49` - `tomcat >= 9.0.0, <= 9.0.29` - `debian_linux = 8.0` - `debian_linux = 9.0` - `debian_linux = 10.0` - `leap = 15.1` - `ubuntu_linux = 16.04` - `agile_engineering_data_management = 6.2.1.0` - `hyperion_infrastructure_technology = 11.1.2.4` - `instantis_enterprisetrack >= 17.1, <= 17.3` - `micros_relate_crm_software = 11.4` - `mysql_enterprise_monitor <= 4.0.11.5331` - `mysql_enterprise_monitor >= 8.0.0, <= 8.0.18.1217` - `retail_order_broker = 15.0` - `transportation_management = 6.3.7` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.