CVE-2021-26079: 
JIRA vulnerability analysis and mitigation

The vulnerability CVE-2021-26079 affects the CardLayoutConfigTable component in Jira Server and Jira Data Center. This security flaw was discovered and reported on May 7, 2021, and affects multiple versions of the software: versions before 8.5.15, versions from 8.6.0 before 8.13.7, and versions from 8.14.0 before 8.17.0 (Jira Issue, NVD).

The vulnerability is classified as a Cross-Site Scripting (XSS) issue that allows remote attackers to inject arbitrary HTML or JavaScript. It has been assigned a CVSS v3.1 base score of 6.1 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, indicating that it requires user interaction but can be exploited remotely without authentication (NVD).

If exploited, this vulnerability allows attackers to inject malicious HTML or JavaScript code, potentially leading to the execution of unauthorized scripts in users' browsers. This could result in theft of sensitive information, session hijacking, or other client-side attacks (NVD).

Atlassian has released fixed versions to address this vulnerability. Users should upgrade to version 8.5.15 if running a version before 8.5.15, version 8.13.7 if running versions between 8.6.0 and 8.13.7, or version 8.17.0 if running versions between 8.14.0 and 8.17.0 (Jira Issue).