CVE-2026-121735

Description

blueprintUE self-hosted edition before 4.3.4 contains an insufficient session expiration vulnerability that allows attackers to confirm accounts using stale tokens because UserModel::findUserIDWithConfirmedToken ignores confirmed_sent_at. Attackers who obtain an old confirmation link from a compromised mailbox, backup, or forwarded mail can activate unconfirmed accounts and evade the unconfirmed-account cleanup job.

References

• https://github.com/blueprintue/blueprintue-self-hosted-edition
• https://github.com/blueprintue/blueprintue-self-hosted-edition/blob/v4.3.3/app/models/UserModel.php#L361-L368
• https://github.com/blueprintue/blueprintue-self-hosted-edition/commit/8bba1615bf76b144ac5cd72637c243490f08bc37
• https://github.com/blueprintue/blueprintue-self-hosted-edition/pull/266
• https://github.com/blueprintue/blueprintue-self-hosted-edition/releases/tag/v4.3.4