Open redirect in Habitica - #VU164354
Published: November 10, 2026
Vulnerability identifier: #VU164354
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to redirect users to an attacker-controlled site through Habitica's authentication flow.
The vulnerability exists due to improper redirect target validation in Habitica's sanitizeRedirect function when processing protocol-relative URLs that are subsequently assigned to window.location.href. A remote attacker can trick a user into following a crafted login URL containing redirectTo=//evil.example/attack to cause navigation to an external origin instead of an application path.
Affected software
Habitica
Remediation
Install security update from vendor's website.
Habitica - update to 5.52.0