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Mentions the CVE; no further detail.
CVE-2019-3396 KEVRansomwarePublic exploit Critical · 9.8 EPSS 99.9%
Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability
Atlassian · Confluence Server and Data Server
Summary
The Widget Connector macro in Atlassian Confluence Server and Data Center contains a server-side template injection flaw in the affected version ranges, with the vulnerability sitting in that macro component. A remote attacker with no authentication and no user interaction, reaching the instance over the network, can achieve path traversal and remote code execution on the server.
Official description · NVD
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.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
83.7 / 100
- Exploited
- Yes, in CISA KEV
- Reports
- 1
- Tactics
- 4/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 29 days after disclosure. Public exploit code (Metasploit) was available the same day.
- First seen exploitedVulnCheck KEV evidence+29 days
- Added to CISA KEVknown ransomware use; EU database agrees+3 yrs
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
3 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order 3Initial AccessTA0001
MITRE CTID mapping of the KEV entry · how it is exploited
CVE-2019-3396 is a critical server-side template injection vulnerability in Atlassian Confluence Server and Data Center that could lead to remote code execution.
Stealth
MITRE CTID mapping of the KEV entry · follow-on activity
Command and ControlTA0011
Proxy T1090
MITRE CTID mapping of the KEV entry · primary impact
Lower-confidence links (3)
These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.
- File and Directory DiscoveryT1083 CTID attack_to_cve Phase 1 "Uncategorized" mapping (not staged by impact)
- Exploit Public-Facing ApplicationT1190 CTID attack_to_cve Phase 1 "Uncategorized" mapping (not staged by impact)
- Exploitation for Client ExecutionT1203 server-side bug exploitable without user interaction; client-execution technique does not fit
Detection
0 rules for this CVE · 83 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2019-3396 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
External Remote ServicesT113320 general rules
- External Remote SMB Logon from Public IPhightest
- OpenCanary - SSH Login Attempthightest
- OpenCanary - SSH New Connection Attempthightest
- OpenCanary - Telnet Login Attempthightest
- Running Chrome VPN Extensions via the Registry 2 VPN Extensionhightest
- Unusual Child Process of dns.exehightest
- Unusual File Deletion by Dns.exehightest
- Unusual File Modification by dns.exehightest
ProxyT109022 general rules
- Communication To LocaltoNet Tunneling Service Initiatedhightest
- Communication To LocaltoNet Tunneling Service Initiated - Linuxhightest
- Communication To Ngrok Tunneling Service - Linuxhightest
- Communication To Ngrok Tunneling Service Initiatedhightest
- HackTool - Htran/NATBypass Executionhightest
- Malicious IP Address Sign-In Failure Ratehightest
- Malicious IP Address Sign-In Suspicioushightest
- Ngrok Usage with Remote Desktop Servicehightest
Indirect Command ExecutionT120241 general rules
- Custom File Open Handler Executes PowerShellhightest
- Diagnostic Library Sdiageng.DLL Loaded By Msdt.EXEhightest
- Outlook EnableUnsafeClientMailRules Setting Enabledhightest
- Potential Arbitrary Command Execution Using Msdt.EXEhightest
- Potential Arbitrary File Download Using Office Applicationhightest
- Potentially Suspicious Office Document Executed From Trusted Locationhightest
- Renamed NirCmd.EXE Executionhightest
- Renamed PAExec Executionhightest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Named in 1 threat report1 reportclearskysec.com
Reports are matched by finding the exact id CVE-2019-3396 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.
Also mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- Actively_Exploited_Kev | Oct 22, 202621 Oct 2026
- 44 more on OTX