CVE-2021-43940

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-02-15 · updated 2026-06-17
Weakness: CWE-427

Description

Affected versions of Atlassian Confluence Server and Data Center allow authenticated local attackers to achieve elevated privileges on the local system via a DLL Hijacking vulnerability in the Confluence installer. This vulnerability only affects installations of Confluence Server and Data Center on Windows. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

Affected products

Atlassian Confluence Data Center: before 7.4.10; from 7.5.0 before 7.12.3 — fixed in 7.12.3, 7.4.10
Atlassian Confluence Data Center: before 7.4.10; from 7.5.0 before 7.12.3 — fixed in 7.12.3, 7.4.10

How to fix

Upgrade to a fixed version: Atlassian Confluence Data Center 7.12.3, 7.4.10; Atlassian Confluence Data Center 7.12.3, 7.4.10. Check the vendor advisory for mitigations.

References

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