#xss

`ExpandableDetailsNote` allows annotating build log content with additional information that can be revealed when interacted with. Jenkins 2.423 and earlier, LTS 2.414.1 and earlier does not escape the value of the `caption` constructor parameter of `ExpandableDetailsNote`. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to provide `caption` parameter values. As of publication, the related API is not used within Jenkins (core), and the Jenkins security team is not aware of any affected plugins. Jenkins 2.424, LTS 2.414.2 escapes `caption` constructor parameter values.

Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier does not escape Failure Cause names in build logs. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to create or update Failure Causes. Build Failure Analyzer Plugin 2.4.2 escapes Failure Cause names in build logs.

A cross-site request forgery (CSRF) vulnerability in Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier allows attackers to delete Failure Causes.

Jenkins 2.423 and earlier, LTS 2.414.1 and earlier creates a temporary file in the system temporary directory with the default permissions for newly created files when installing a plugin from a URL, potentially allowing attackers with access to the system temporary directory to replace the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.

Jenkins 2.50 through 2.423 (both inclusive), LTS 2.60.1 through 2.414.1 (both inclusive) does not exclude sensitive build variables (e.g., password parameter values) from the search in the build history widget, allowing attackers with Item/Read permission to obtain values of sensitive variables used in builds by iteratively testing different characters until the correct sequence is discovered.

A cross-site request forgery (CSRF) vulnerability in Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier allows attackers to connect to an attacker-specified hostname and port using attacker-specified username and password.

Jenkins 2.423 and earlier, LTS 2.414.1 and earlier does not escape the value of the 'caption' constructor parameter of 'ExpandableDetailsNote', resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to control this parameter.

Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier does not escape Failure Cause names in build logs, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to create or update Failure Causes.

In Jenkins 2.423 and earlier, LTS 2.414.1 and earlier, processing file uploads using the Stapler web framework creates temporary files in the default system temporary directory with the default permissions for newly created files, potentially allowing attackers with access to the Jenkins controller file system to read and write the files before they are used.

A flaw was found in Keycloak. Under specific circumstances, HTML entities are not sanitized during user impersonation, resulting in a Cross-site scripting (XSS) vulnerability.