Stored cross-site scripting in Build Pipeline - CVE-2019-10373

Detailed vulnerability description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to the affected software does not properly escape variables in views. A remote authenticated attacker able to edit the build pipeline description can inject arbitrary HTML and JavaScript in the plugin-provided web pages in Jenkins.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Note: This vulnerability is only exploitable on Jenkins releases older than 2.146 or 2.138.2 due to the security hardening implemented in those releases.

How to mitigate CVE-2019-10373

Sources

• http://www.openwall.com/lists/oss-security/2019/08/07/1
• https://jenkins.io/security/advisory/2019-08-07/#SECURITY-879