A vulnerability was found in modauthmellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apruriparse function.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "0.12.0-2+deb9u1build0.16.04.1", "binary_name": "libapache2-mod-auth-mellon" }, { "binary_version": "0.12.0-2+deb9u1build0.16.04.1", "binary_name": "libapache2-mod-auth-mellon-dbgsym" } ] }