CVE-2021-25994: Userfrosting

High severity, CVSS 8.8. EPSS: 1.5% chance of exploitation in the next 30 days.

In Userfrosting, versions v0.3.1 to v4.6.2 are vulnerable to Host Header Injection. By luring a victim application user to click on a link, an unauthenticated attacker can use the “forgot password” functionality to reset the victim’s password and successfully take over their account.

Affected products

• Userfrosting Userfrosting: from 0.3.1, before 4.6.3 (fixed in 4.6.3)

Published 2022-01-03. Last modified 2026-06-17.