Jenkins Embeddable Build Status Plugin 2.0.3 allows specifying a ‘link’ query parameter that build status badges will link to, without restricting possible values, resulting in a reflected cross-site scripting (XSS) vulnerability.

Jenkins Pipeline: Input Step Plugin 448.v37cea_9a_10a_70 and earlier archives files uploaded for `file` parameters for Pipeline `input` steps on the controller as part of build metadata, using the parameter name without sanitization as a relative path inside a build-related directory, allowing attackers able to configure Pipelines to create or replace arbitrary files on the Jenkins controller file system with attacker-specified content.

Jenkins JUnit Plugin 1119.va_a_5e9068da_d7 and earlier does not escape descriptions of test results, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Run/Update permission.

In Jenkins 2.355 and earlier, LTS 2.332.3 and earlier, an observable timing discrepancy on the login form allows distinguishing between login attempts with an invalid username, and login attempts with a valid username and wrong password, when using the Jenkins user database security realm.

In Jenkins 2.340 through 2.355 (both inclusive) the tooltip of the build button in list views supports HTML without escaping the job display name, resulting in a cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.