In SonarQube before 10.4 and 9.9.4 LTA, encrypted values generated using the Settings Encryption feature are potentially exposed in cleartext as part of the URL parameters in the logs (such as SonarQube Access Logs, Proxy Logs, etc).
A vulnerability in the API of SonarSource SonarQube before 7.4 could allow an authenticated user to discover sensitive information such as valid user-account logins in the web application. The vulnerability occurs because of improperly configured access controls that cause the API to return the externalIdentity field to non-administrator users. The attacker could use this information in subsequent attacks against the system.
The Jenkins Plugin for SonarQube 3.7 and earlier allows remote authenticated users to obtain sensitive information (cleartext passwords) by reading the value in the sonar.sonarPassword parameter from jenkins/configure.