Cross-site request forgery (CSRF) vulnerability in Redback before 1.2.4, as used in Apache Archiva 1.0 through 1.0.3, 1.1 through 1.1.4, 1.2 through 1.2.2, and 1.3 through 1.3.1; and Apache Continuum 1.3.6, 1.4.0, and 1.1 through 1.2.3.1; allows remote attackers to hijack the authentication of administrators for requests that modify credentials.