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CVE-2019-3396: Atlassian Confluence Server and Data Center Server-Side Template Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2019-3396
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Atlassianproduct: Confluence Server and Data CenterRemote code executionPath traversal
What
The vulnerability allows for server-side template injection that may lead to path traversal and remote code execution.
Who is affected
Deployments of Atlassian Confluence Server and Data Center.
Urgency
Remediation is urgent as the vulnerability is actively exploited and critical.
Action
Update to the latest version of Confluence.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-3396

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2019-3396coverage & exploitation statusNVD · CVE.org

Recent advisories for Atlassian Confluence Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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