EUVD-2026-24203CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionNVD
blueprintUE is a tool to help Unreal Engine developers. Prior to 4.2.0, when a user changes their password via the profile edit page, or when a password reset is completed via the reset link, neither operation invalidates existing authenticated sessions for that user. A server-side session store associates userID → session; the current password change/reset flow updates only the password column in the users table and does not destroy or mark invalid any active sessions. As a result, an attacker who has already compromised a session retains full access to the account indefinitely - even after the legitimate user has detected the intrusion and changed their password - until the session's natural expiry time (configured as SESSION_GC_MAXLIFETIME, defaulting to 86400 seconds / 24 hours, with SESSION_LIFETIME=0 meaning persistent until browser close or GC, whichever is later). This vulnerability is fixed in 4.2.0.
AnalysisAI
blueprintUE prior to version 4.2.0 fails to invalidate active user sessions when passwords are changed or reset, allowing attackers with compromised sessions to maintain indefinite account access even after the legitimate user detects the breach and changes their password. The attacker retains full account privileges until the session naturally expires (default 24 hours) or is manually cleared, creating a critical window where password changes provide no security benefit.
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External POC / Exploit Code
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