Apache · Apache Tomcat · CVE-2019-17563
**Name of the Vulnerable Software and Affected Versions**
Apache Tomcat versions 9.0.0.M1 through 9.0.29
Apache Tomcat versions 8.5.0 through 8.5.49
Apache Tomcat versions 7.0.0 through 7.0.98
**Description**
The issue is related to a session fixation attack when using FORM authentication. An attacker could potentially exploit this to gain unauthorized access to confidential data, cause a denial of service, and impact data integrity. The window for exploitation is considered narrow, but the issue is treated as a security concern.
**Recommendations**
For Apache Tomcat versions 9.0.0.M1 through 9.0.29, update to a version outside of this range to mitigate the risk.
For Apache Tomcat versions 8.5.0 through 8.5.49, update to a version outside of this range to mitigate the risk.
For Apache Tomcat versions 7.0.0 through 7.0.98, update to a version outside of this range to mitigate the risk.
As a temporary workaround, consider restricting access to FORM authentication until a patch is available.