The ViewUpgrades resource in Jira before version 7.13.4, from version 8.0.0 before version 8.0.4, and from version 8.1.0 before version 8.1.1 allows remote attackers who have obtained access to administrator's session to access the ViewUpgrades administrative resource without needing to re-authenticate to pass "WebSudo" through an improper access control vulnerability.