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OpenAdvisories
High · 8.1 CVE-2026-39923 EUVD-2026-53389GHSA-3mr9-883x-4f3x

Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset

Published Aug 5, 2026 · Updated Nov 8, 2026 · Assigned by VulnCheck

Description

Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.

Affected products

VendorProductAffectedFixed
Flarum Flarum Framework < 1.8.16 1.8.16

References