vulnerability / NVI-00011886 / Revision 1
Vikunja: TOTP secret is readable after enrollment, no step-up auth
GitHub lists this reviewed advisory for code.vikunja.io/api. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
code.vikunja.io/api
source listed<= 2.5.0
### Summary Once a user has TOTP enabled, the API still hands back the raw shared secret to anyone holding that account's access token. Reading it doesn't ask for the password, even though disabling TOTP does. So a stolen token, an XSS, or a browser left open is enough to copy the second factor into your own authenticator and keep generating valid codes indefinitely. ### Details `GET /api/v1/user/settings/totp` returns the full TOTP object, including the secret field and the otpauth:// provisioning URL. `GET /api/v1/user/settings/totp/qrcode` renders the same secret as a QR image. Neither requires re-authentication, the access token alone is enough. This is inconsistent with the rest of the flow: `POST /api/v1/user/settings/totp/disable` calls CheckUserPassword before it will turn TOTP off. So the destructive action is gated behind the password, but reading out the secret that backs the second factor isn't. There's also no reason for the secret to be readable at all once enrollment is finished, the client only needs it during setup. The fix is to stop returning secret/url/the QR code once enabled is true (only expose them during the enrollment window). Requiring the password on
03 / Response
What to do next
- investigate
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-88f6-4rjv-x774 ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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