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Vulnerability record · CVE-2019-17563 · published 23 December 2019

CVE-2019-17563: Apache tomcat vulnerability

Apache · Tomcat

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.

7.5 CVSS 3.1 High EPSS 11% · top 4.3% CWE-384 · CWE-384
7.5CVSS 3.1 base score, v2 5.1
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
38References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html Third Party Advisory
https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apach Mailing ListVendor Advisory
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e%40%3Cissues.cxf.apache.or
https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2019/Dec/43 Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-43 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200107-0001/ Third Party Advisory
https://usn.ubuntu.com/4251-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4596 Third Party Advisory
https://www.debian.org/security/2020/dsa-4680 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.html PatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html Third Party Advisory
https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apach Mailing ListVendor Advisory
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a%40%3Cdev.tomcat.apache.or
https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e%40%3Cissues.cxf.apache.or
https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html Mailing ListThird Party Advisory
https://seclists.org/bugtraq/2019/Dec/43 Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-43 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200107-0001/ Third Party Advisory
https://usn.ubuntu.com/4251-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4596 Third Party Advisory
https://www.debian.org/security/2020/dsa-4680 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujul2020.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-17563), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.