| Title | Janeczku Calibre-web V0.6.7-V0.6.26 IDOR in auth-token generation leading to account takeover / user |
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| Description | An Insecure Direct Object Reference (IDOR) vulnerability in janeczku/calibre-web allows an authenticated user to impersonate any other user on the platform. The endpoint /kobo_auth/generate_auth_token/<int:user_id> does not validate if the requester has administrative privileges or matches the targeted user_id. An attacker can generate a long-lived auth token for a victim and use it against the /kobo/<auth_token>/v1/initialization route. user_id is an integer that increments from 1, so it is easy to guess the administrator's user_id. Because the application calls login_user(user) based on the token owner within the requires_kobo_auth decorator, this leads to a complete session takeover and persistent impersonation of the victim. |
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| Source | ⚠️ https://drive.google.com/drive/folders/1rosrcfxcHrQM7_GOiBwzY_GnCfXoFuVR?usp=drive_link |
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| User | JasperX (UID 97281) |
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| Submission | 04/15/2026 18:03 (3 months ago) |
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| Moderation | 05/03/2026 09:35 (18 days later) |
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| Status | Accepted |
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| VulDB entry | 360885 [janeczku Calibre-Web up to 0.6.26 Endpoint cps/kobo_auth.py generate_auth_token user_id improper authorization] |
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| Points | 20 |
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