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CVE-2021-43940

HIGH
7.8
CVSS Score
Published: February 15, 2022 at 03:15 AM UTC
Updated: June 17, 2026 at 04:11 AM UTC
2 products affected across 1 vendorConfluence ServerConfluence Data Center· also runs on 1 platform

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Confluence Data Center· Atlassianatlassian-app
95%
v ≥ 7.5.0v < 7.12.3v < 7.4.107.5.0 ≤ v < 7.12.37.5.0
Affected range stops below 7.12.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.4.10, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
Confluence Server· Atlassianatlassian-app
95%
v ≥ 7.5.0v < 7.12.3v < 7.4.107.5.0 ≤ v < 7.12.37.5.0
Affected range stops below 7.12.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.4.10, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCIssue TrackingVendor Advisory
Source: [email protected]
https://jira.atlassian.com/browse/CONFSERVER-66550

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-427

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