Habitica is an open-source habit-building program. Versions prior to 5.28.5 are vulnerable to reflected cross-site scripting. The "login" and "social media" function in "RegisterLoginReset.vue" contains two reflected XSS vulnerabilities due to an incorrect sanitization function. An attacker can specify a malicious "redirectTo" parameter to trigger the vulnerability, giving the attacker control of the victim’s account when a victim registers or logins with a specially crafted link. Version 5.28.5 contains a patch.