CVE-2020-14183: 
JIRA vulnerability analysis and mitigation

CVE-2020-14183 is an Information Disclosure vulnerability affecting Jira Server & Data Center that was discovered and disclosed in October 2020. The vulnerability allows remote attackers with limited (non-admin) privileges to view a Jira instance's Support Entitlement Number (SEN) through HTTP Response headers. The affected versions include versions before 7.13.18, versions from 8.0.0 before 8.5.9, and versions from 8.6.0 before 8.12.1 (Jira Issue, CVE Details).

The vulnerability exists in the HTTP Response headers of affected Jira Server & Data Center installations, where the Support Entitlement Number (SEN) is exposed to users with limited privileges. The vulnerability has been assigned a CVSS Score of 4.3, indicating medium severity (Jira Issue).

The primary impact of this vulnerability is the unauthorized disclosure of the Jira instance's Support Entitlement Number (SEN) to users with limited privileges. While the direct impact is limited to information disclosure, the exposed SEN could potentially be used for further exploitation or social engineering attempts (CVE Details).

The vulnerability requires an attacker to have limited (non-admin) privileges on the Jira instance to exploit the information disclosure in the HTTP Response headers (Jira Issue).

Atlassian has released fixed versions to address this vulnerability. Users are advised to upgrade to version 7.13.18 or later (for 7.x series), version 8.5.9 or later (for 8.5.x series), or version 8.12.1 or later (for 8.x series). The fix is also included in versions 8.13.0 and 8.14.0 (Jira Issue).