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CVE-2019-3396

Atlassian Confluence Server and Data Center Server-Side Template Injection

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 99.9%
  1. Published25 Mar 2019
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

Atlassian Confluence Server and Data Center contain a server-side template injection vulnerability that may allow an attacker to achieve path traversal and remote code execution.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022Used in ransomware

Description

The Widget Connector macro in Atlassian Confluence Server before version 6.6.12 (the fixed version for 6.6.x), from version 6.7.0 before 6.12.3 (the fixed version for 6.12.x), from version 6.13.0 before 6.13.3 (the fixed version for 6.13.x), and from version 6.14.0 before 6.14.2 (the fixed version for 6.14.x), allows remote attackers to achieve path traversal and remote code execution on a Confluence Server or Data Center instance via server-side template injection.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Atlassian Confluence Server≥ 6.13.0 < 6.13.3 · ≥ 6.14.0 < 6.14.2 · ≥ 6.7.0 < 6.12.3 · < 6.6.12

Remediation

Fixed in
Atlassian Confluence Server≥ 6.13.3

References

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Frequently asked

Is CVE-2019-3396 being actively exploited?

Yes. CVE-2019-3396 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021. It has been used in ransomware campaigns.

How severe is CVE-2019-3396?

CVE-2019-3396 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 99.9% probability of exploitation.

Which products are affected by CVE-2019-3396?

Affected products include Atlassian Confluence Server.

How do I fix CVE-2019-3396?

Upgrade affected software to a fixed version, for example Atlassian Confluence Server 6.13.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-3396 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.