IDOR in password change page leads to administrative account takeover in kareadita/kavita


Reported on

Aug 6th 2022


The password change function doesn't properly handle the Change Password role, allowing to any user, that has this role enabled, to change the password of any user in the system, including the administrator account.

Proof of Concept

  1. 1 - Log in as a normal user that can change its own password.
  2. 2 - Send the following request:
POST /api/account/reset-password HTTP/1.1
Host: localhost:5000
Content-Type: application/json
Authorization: Bearer <user-token>

  1. 3 - The admin password is changed successfully idor


An attacker can change the password of any user in the system, including the administrator, which leads to the application takeover.

We are processing your report and will contact the kareadita/kavita team within 24 hours. 2 months ago
We have contacted a member of the kareadita/kavita team and are waiting to hear back a month ago
kareadita/kavita maintainer has acknowledged this report a month ago
Joseph Milazzo validated this vulnerability a month ago
vultza has been awarded the disclosure bounty
The fix bounty is now up for grabs
The researcher's credibility has increased: +7
Joseph Milazzo
a month ago


Fixed locally

Joseph Milazzo confirmed that a fix has been merged on 9c31f7 a month ago
Joseph Milazzo has been awarded the fix bounty
AccountController.cs#L79 has been validated
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