modauthmellon through 0.14.2 has an Open Redirect via the login?ReturnTo= substring, as demonstrated by omitting the // after http: in the target URL.
{ "ubuntu_priority": "medium" }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "0.13.1-1ubuntu0.2", "binary_name": "libapache2-mod-auth-mellon" }, { "binary_version": "0.13.1-1ubuntu0.2", "binary_name": "libapache2-mod-auth-mellon-dbgsym" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "0.14.2-1ubuntu2", "binary_name": "libapache2-mod-auth-mellon" }, { "binary_version": "0.14.2-1ubuntu2", "binary_name": "libapache2-mod-auth-mellon-dbgsym" } ] }