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Fencer Vulns
critical 9.8

CVE-2019-3396 kev+ ransomware in the critical feed json

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.…

published 2019-03-25 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-13035

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03, used in ransomware
epss
99.9%
EPSS 99.9% chance of exploitation in 30 days, percentile 99.9%
public exploits
3
Metasploit, Exploit-DB, plus a Nuclei check

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • Atlassian Confluence Server 6.6.12, 6.12.3, 6.13.3, 6.14.2

Timeline

  1. First public exploit (Metasploit exploit/multi/http/confluence_widget_connector)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5 y ago
Patch by
2022-05-03 (4 y ago)
Ransomware
Known to be used in ransomware campaigns
Required action
Apply updates per vendor instructions.
Vendor, product
Atlassian, Confluence Server and Data Server
CISA name
Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1133 External Remote Services exploitation
  • T1090 Proxy primary impact
  • T1202 Indirect Command Execution secondary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

99.91% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/multi/http/confluence_widget_connector Atlassian Confluence Widget Connector Macro Velocity Template Injection metasploit exploit, excellent rank, 2019-03-25
  • EDB-49465 Atlassian Confluence Widget Connector Macro - SSTI webapps, 2021-01-22
  • EDB-46731 Atlassian Confluence Widget Connector Macro - Velocity Template Injection (Metasploit) remote, 2019-04-19
  • Nuclei template Atlassian Confluence Server - Path Traversal nuclei detection template
  • packetstormsecurity.com http://packetstormsecurity.com/files/152568/Atlassian-Confluence-Widget-Connector-Macro-Velocity-Template-Injection.html referenced PoC, tagged "exploit" by a source, unverified
  • rapid7.com http://www.rapid7.com/db/modules/exploit/multi/http/confluence_widget_connector referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/161065/Atlassian-Confluence-6.12.1-Template-Injection.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Atlassian Confluence Server

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.