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Vulnerability details: VCID-dzpn-w4b3-vbcm
Vulnerability ID VCID-dzpn-w4b3-vbcm
Aliases CVE-2019-17563
GHSA-9xcj-c8cr-8c3c
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 exploit to be practical but, erring on the side of caution, this issue has been treated as a security vulnerability.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-384 Session Fixation
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 7.5 http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html
generic_textual HIGH http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-17563.json
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
epss 0.0326 https://api.first.org/data/v1/epss?cve=CVE-2019-17563
apache_tomcat Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17563
cvssv3.1 3.4 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-9xcj-c8cr-8c3c
cvssv3.1 7.5 https://github.com/apache/tomcat
generic_textual HIGH https://github.com/apache/tomcat
cvssv3.1 7.5 https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E
cvssv3.1 7.5 https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
cvssv3.1 7.5 https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
cvssv3.1 7.5 https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
cvssv3.1 7.5 https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E
cvssv3.1 7.5 https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
cvssv3.1 7.5 https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e@%3Cissues.cxf.apache.org%3E
generic_textual HIGH https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e@%3Cissues.cxf.apache.org%3E
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-17563
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2019-17563
cvssv3.1 7.5 https://seclists.org/bugtraq/2019/Dec/43
generic_textual HIGH https://seclists.org/bugtraq/2019/Dec/43
cvssv3.1 7.5 https://security.gentoo.org/glsa/202003-43
generic_textual HIGH https://security.gentoo.org/glsa/202003-43
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20200107-0001
generic_textual HIGH https://security.netapp.com/advisory/ntap-20200107-0001
cvssv3.1 7.5 https://usn.ubuntu.com/4251-1
generic_textual HIGH https://usn.ubuntu.com/4251-1
cvssv3.1 7.5 https://www.debian.org/security/2019/dsa-4596
generic_textual HIGH https://www.debian.org/security/2019/dsa-4596
cvssv3.1 7.5 https://www.debian.org/security/2020/dsa-4680
generic_textual HIGH https://www.debian.org/security/2020/dsa-4680
cvssv3.1 7.5 https://www.oracle.com/security-alerts/cpuapr2020.html
generic_textual HIGH https://www.oracle.com/security-alerts/cpuapr2020.html
cvssv3.1 7.5 https://www.oracle.com/security-alerts/cpujan2021.html
generic_textual HIGH https://www.oracle.com/security-alerts/cpujan2021.html
cvssv3.1 7.5 https://www.oracle.com/security-alerts/cpujul2020.html
generic_textual HIGH https://www.oracle.com/security-alerts/cpujul2020.html
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-17563.json
https://api.first.org/data/v1/epss?cve=CVE-2019-17563
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/apache/tomcat
https://github.com/apache/tomcat/commit/1ecba14e690cf5f3f143eef6ae7037a6d3c16652
https://github.com/apache/tomcat/commit/e19a202ee43b6e2a538be5515ae0ab32d8ef112c
https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e@%3Cissues.cxf.apache.org%3E
https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html
https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
https://nvd.nist.gov/vuln/detail/CVE-2019-17563
https://seclists.org/bugtraq/2019/Dec/43
https://security.gentoo.org/glsa/202003-43
https://security.netapp.com/advisory/ntap-20200107-0001
https://security.netapp.com/advisory/ntap-20200107-0001/
https://usn.ubuntu.com/4251-1
https://usn.ubuntu.com/4251-1/
https://www.debian.org/security/2019/dsa-4596
https://www.debian.org/security/2020/dsa-4680
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.oracle.com/security-alerts/cpujul2020.html
1785711 https://bugzilla.redhat.com/show_bug.cgi?id=1785711
CVE-2019-17563 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17563
GHSA-9xcj-c8cr-8c3c https://github.com/advisories/GHSA-9xcj-c8cr-8c3c
RHSA-2020:0860 https://access.redhat.com/errata/RHSA-2020:0860
RHSA-2020:0861 https://access.redhat.com/errata/RHSA-2020:0861
RHSA-2020:1520 https://access.redhat.com/errata/RHSA-2020:1520
RHSA-2020:1521 https://access.redhat.com/errata/RHSA-2020:1521
RHSA-2020:4004 https://access.redhat.com/errata/RHSA-2020:4004
RHSA-2021:0882 https://access.redhat.com/errata/RHSA-2021:0882
RHSA-2021:1030 https://access.redhat.com/errata/RHSA-2021:1030
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00013.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-17563.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/apache/tomcat
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/r3bbb800a816d0a51eccc5a228c58736960a9fffafa581a225834d97d@%3Cdev.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/r48c1444845fe15a823e1374674bfc297d5008a5453788099ea14caf0@%3Cdev.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/r6ccee4e849bc77df0840c7f853f6bd09d426f6741247da2b7429d5d9@%3Cdev.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c@%3Cdev.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/raba0fabaf4d56d4325ab2aca8814f0b30a237ab83d8106b115ee279a@%3Cdev.tomcat.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.apache.org/thread.html/reb9a66f176df29b9a832caa95ebd9ffa3284e8f4922ec4fa3ad8eb2e@%3Cissues.cxf.apache.org%3E
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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.debian.org/debian-lts-announce/2020/01/msg00024.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-17563
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://seclists.org/bugtraq/2019/Dec/43
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://security.gentoo.org/glsa/202003-43
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://security.netapp.com/advisory/ntap-20200107-0001
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://usn.ubuntu.com/4251-1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.debian.org/security/2019/dsa-4596
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.debian.org/security/2020/dsa-4680
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.oracle.com/security-alerts/cpuapr2020.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.oracle.com/security-alerts/cpujan2021.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.oracle.com/security-alerts/cpujul2020.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.87086
EPSS Score 0.0326
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:38:08.621463+00:00 Apache Tomcat Importer Import https://tomcat.apache.org/security-9.html 38.0.0