CVE-2023-49438: Flask-Security-Too Project Flask-Security-Too

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

An open redirect vulnerability in the python package Flask-Security-Too <=5.3.2 allows attackers to redirect unsuspecting users to malicious sites via a crafted URL by abusing the ?next parameter on the /login and /register routes.

Affected products

• Flask-Security-Too Project Flask-Security-Too: up to and including 5.3.2

Published 2023-12-26. Last modified 2026-06-17.