Habitica is an open-source habit-building program. Versions prior to 5.28.5 are vulnerable to reflected cross-site scripting. The `register` function in `home.vue` containsa reflected XSS vulnerability due to an incorrect sanitization function. An attacker can specify a malicious `redirectTo` parameter to trigger the vulnerability. Arbitrary javascript can be executed by the attacker in the context of the victim’s session. Version 5.28.5 contains a patch.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.