Stored cross-site scripting in Jenkins - CVE-2019-10402

Detailed vulnerability description

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

The vulnerability exists due to insufficient sanitization of user-supplied data when the "f:combobox" form control interpreted its item labels as HTML. A remote authenticated attacker with permission to define its contents can permanently inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

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.

How to mitigate CVE-2019-10402

Sources

• http://www.openwall.com/lists/oss-security/2019/09/25/3
• https://jenkins.io/security/advisory/2019-09-25/#SECURITY-1525