CVE-2019-17563: Apache Tomcat

High severity, CVSS 7.5. EPSS: 10.7% chance of exploitation in the next 30 days.

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 products

• Apache Tomcat: from 7.0.0, up to and including 7.0.98; from 8.5.0, up to and including 8.5.49; from 9.0.0, up to and including 9.0.29
• Canonical Ubuntu Linux: version 16.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Opensuse Leap: version 15.1 only
• Oracle Agile Engineering Data Management: version 6.2.1.0 only
• Oracle Hyperion Infrastructure Technology: version 11.1.2.4 only
• Oracle Instantis Enterprisetrack: from 17.1, up to and including 17.3
• Oracle Micros Relate CRM Software: version 11.4 only
• Oracle MySQL Enterprise Monitor: up to and including 4.0.11.5331; from 8.0.0, up to and including 8.0.18.1217
• Oracle Retail Order Broker: version 15.0 only
• Oracle Transportation Management: version 6.3.7 only

Published 2019-12-23. Last modified 2026-10-08.