CVE-2021-25994: Userfrosting - Host-Header Injection Leads to Account Takeover

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-03 · updated 2026-06-17
Weakness: CWE-74

Description

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: from 0.3.1 before 4.6.3 — fixed in 4.6.3

How to fix

Upgrade to a fixed version: userfrosting 4.6.3. Check the vendor advisory for mitigations.

References

https://github.com/userfrosting/UserFrosting/commit/796dd78757902435d1bd286415feea78098e45ba
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25994
https://github.com/userfrosting/UserFrosting/commit/796dd78757902435d1bd286415feea78098e45ba
https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25994

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