CVE-2021-43940: 
Confluence Server vulnerability analysis and mitigation

CVE-2021-43940 is a DLL Hijacking vulnerability affecting Atlassian Confluence Server and Data Center installations on Windows systems. The vulnerability was discovered and reported in July 2021, affecting versions before 7.4.10 and versions 7.5.0 to 7.12.3. This security issue allows authenticated local attackers to achieve elevated privileges on the local system through the Confluence installer (Atlassian Jira, CVE Mitre).

The vulnerability is classified as CWE-427 (Uncontrolled Search Path Element) and received a CVSS score of 7.0 (High severity). The issue specifically manifests as a DLL Hijacking vulnerability in the Confluence installer component, which can be exploited by authenticated local attackers to elevate their privileges on Windows systems (NVD Database).

When successfully exploited, this vulnerability allows authenticated local attackers to achieve elevated privileges on the affected Windows system, potentially compromising the security of the Confluence Server and Data Center installation (Atlassian Jira).

Atlassian has addressed this vulnerability by releasing fixed versions: 7.4.10, 7.12.3, and 7.13.0. Users running affected versions (before 7.4.10 or from 7.5.0 before 7.12.3) should upgrade to the appropriate fixed version to mitigate this security risk (Atlassian Jira).