CVE-2019-3396
Published: November 3, 2021
Official Description
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.
CISA KEV Advisory
Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability
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.
Apply updates per vendor instructions.
Risk Analysis
Atlassian Confluence Server and Data Center are vulnerable to a server-side template injection, which can lead to path traversal and remote code execution. The high EPSS score of 0.94471 indicates a very high probability of exploitation, requiring immediate attention.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, confirming its active use by attackers.
Apply the latest security updates and patches for Atlassian Confluence Server and Data Center to mitigate this critical remote code execution vulnerability.
Technical Analysis
CVE-2019-3396 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-3396 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-3396 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1