REST API in Atlassian Jira Server and Jira Data Center before version 8.5.14, from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1 allows remote attackers to enumerate usernames via a Sensitive Data Exposure vulnerability in the `/rest/api/latest/user/avatar/temporary` endpoint.

According to its self-reported version number, the instance of Atlassian Jira hosted on the remote web server is prior to 8.5.14, 8.6.x prior to 8.13.6 or 8.14.x prior to 8.16.1. It is, therefore, affected by a vulnerability that permits remote attackers to discover the username of users via an enumeration vulnerability in the REST API.

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
113694	Atlassian Jira 8.14.0 < 8.16.1 Username Enumeration	Web App Scanning	Component Vulnerability	medium
113693	Atlassian Jira 8.6.0 < 8.13.6 Username Enumeration	Web App Scanning	Component Vulnerability	medium
113692	Atlassian Jira < 8.5.14 Username Enumeration	Web App Scanning	Component Vulnerability	medium

Detections

Analytics

CVE-2021-26081

medium

Tenable Plugins

medium

medium

medium