Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The Customer Context Filter in Atlassian Jira Service Desk Server and Jira Service Desk Data Center before version 3.9.16, from version 3.10.0 before version 3.16.8, from version 4.0.0 before version 4.1.3, from version 4.2.0 before version 4.2.5, from version 4.3.0 before version 4.3.4, and version 4.4.0 allows remote attackers with portal access to view arbitrary issues in Jira Service Desk projects via a path traversal vulnerability. Note that when the 'Anyone can email the service desk or raise a request in the portal' setting is enabled, an attacker can grant themselves portal access, allowing them to exploit the vulnerability.
CWE-22 - Path Traversal
Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.