CVE-2019-11581

What is Atlassian Jira?

Jira Server and Data Center are among the most widely deployed issue-tracking and project-management platforms in enterprise and government environments, often holding sensitive project data, credentials embedded in tickets, and integration secrets for connected development tooling. Its ubiquity in software organizations makes any pre-authentication or low-friction remote code execution bug in Jira an especially attractive target.

Overview

CVE-2019-11581 is a server-side template injection (SSTI) vulnerability in Jira Server and Data Center's "Contact Administrators" and outgoing-email template features. If an administrator has left these template-editing features misconfigured or exposed to non-trusted users, an attacker can inject a malicious Apache Velocity template expression that Jira evaluates server-side, leading to arbitrary remote code execution with the privileges of the Jira application.

Technical Details

The root cause (CWE-74, improper neutralization of special elements/injection) is that certain administrator-editable email/notification templates (such as the template used by the "Contact Administrators" form and the "Deploy plugin" or SMTP mail server configuration templates) are rendered using the Apache Velocity templating engine without adequately restricting the template syntax an attacker can supply. Velocity templates can invoke arbitrary Java methods, so injecting a crafted expression into a template field lets an attacker execute operating-system commands or Java code when Jira later renders that template — for instance, when it sends an email notification. Exploitation typically requires an attacker to reach a Jira instance where template-editing functionality is accessible (either because an administrator account is compromised, or because certain configurations expose the affected functionality more broadly), which the CVSS vector reflects as requiring no privileges or user interaction once the vulnerable pathway is reachable.

Discovery

Atlassian identified and disclosed this vulnerability itself, publishing a security advisory and patched Jira releases in July 2019 that harden the template rendering pathway against injection.

Exploitation Context

This bug has seen sustained exploitation against internet-facing Jira instances that were not promptly patched, and has appeared in the toolkits of both opportunistic scanning campaigns and more sophisticated intrusions seeking access to enterprise source code and project data. Its CISA KEV listing confirms real-world exploitation, consistent with the pattern of older, unpatched Atlassian products remaining attractive long-term targets years after a fix is available.

Remediation

1. Upgrade to a patched Jira Server or Data Center release (7.6.14, 7.13.5, 8.0.3, 8.1.2, 8.2.3, or later) that hardens the Velocity template rendering pathway.
2. Restrict access to Jira's administrative template-editing functionality to trusted, MFA-protected administrator accounts only.
3. Avoid exposing Jira's "Contact Administrators" and related outbound-mail configuration features to untrusted networks.
4. Review Jira application logs and email-template configuration history for unexpected modifications that could indicate injection attempts.
5. Apply network segmentation so that even if Jira is compromised, lateral movement into source control and other high-value systems is limited.