Background exploitation KEV catalog Ransomware No authentication

CVE-2019-3396

Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability

CheckOps priority index

9.9/10 Patch within 24 h

Severity9.8

Probability10.0

Exploitation5/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 99.9% higher than 99.97% of CVEs

CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,826 days 03 Nov 2021

CISA due date 03 May 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 5 / 5

KEV catalog (CISA)03 Nov 2021
Exploited in EUVD (ENISA)03 Nov 2021
Used by ransomwareyes
EPSS above 10 %99.9%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

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.

Affected products

Confluence ServerConfluence Server and Data Server

Affected versions

unspecified <6.13.3
next of 6.14.0 <unspecified
unspecified <6.6.12
unspecified <6.12.3
unspecified <6.14.2
next of 6.13.0 <unspecified
6.7.0 <unspecified

Weaknesses (CWE)

CWE-22

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

25 Mar 2019
Published
03 Nov 2021
Exploitation reported (ENISA)
03 Nov 2021
Added to the KEV catalog
03 May 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 99.9%

References

Other exploited vulnerabilities from the same vendor

CVE-2026-21589Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
9.1 · Rising fast
CVE-2021-26086Atlassian Jira Server and Data Center Path Traversal Vulnerability
7.5 · Background exploitation
CVE-2023-22527Atlassian Confluence Data Center and Server Template Injection Vulnerability
10.0 · Background exploitation
CVE-2023-22518Atlassian Confluence Data Center and Server Improper Authorization Vulnerability
10.0 · Background exploitation
CVE-2023-22515Atlassian Confluence Data Center and Server Broken Access Control Vulnerability
10.0 · Background exploitation
CVE-2022-36804Atlassian Bitbucket Server and Data Center Command Injection Vulnerability
8.3 · Background exploitation