How to proceed to remediate these vulnerabilities

[Devendar Gangapuram]

Hi, 

Some one please help me how to following vulnerabilities listed below, ours is JIRA server installed on our own machine. Please assist me asap . 

Atlassian Jira Cross-Site Scripting Vulnerability(JRASERVER-71652)
Atlassian Jira Server And Data Center Improper Authentication Vulnerability(JRASERVER-72029)
Atlassian Jira Server And Data Center Privilege Escalation Vulnerability(JRASERVER-72258)
Atlassian Jira Server Cross-Site Scripting Vulnerability(JRASERVER-72115)
Atlassian Jira Server Information Disclosure Vulnerability (JRASERVER-71559)
Atlassian Jira Server Information Disclosure Vulnerability (JRASERVER-72010, JRASERVER-72059)
Atlassian Jira Server Information Disclosure Vulnerability (JRASERVER-72316)
Atlassian Jira Server Information Disclosure Vulnerability(JRASERVER-72272)

[Nic Brough -Adaptavist-]

Check each one for the "fix version", and upgrade to (at least) the lowest version that fixes them all.