Summary
Acunetix 360 identified a version disclosure (Liferay Portal) in the target web server's HTTP response.
This information can help an attacker gain a greater understanding of the systems in use and potentially develop further attacks targeted at the specific version of Liferay Portal.
Impact
An attacker might use the disclosed information to harvest specific security vulnerabilities for the version identified.
Remediation
Apply the following changes on your portal-ext.properties file to disable Liferay header version verbosity:
http.header.version.verbosity=Off