An open redirect vulnerability exists in the Account module in Volosoft ABP Framework >= 5.1.0 and < 10.0.0-rc.2. Improper validation of the returnUrl parameter in the register function allows an attacker to redirect users to arbitrary external domains.
https://github.com/abpframework/abp/commit/a01adc58464d278ca817c4bbb6cbce30f155d0d1
https://github.com/abpframework/abp/commit/44a2dc14e933f3ce1ca93f9313d836694ab77d1d