Description
PLANKA 2.2.0 through 2.2.1 fails to limit incorrect TOTP codes submitted to POST /api/access-tokens/verify-totp, allowing attackers to brute force two-factor authentication codes. Attackers who know a user's password can reuse the ten-minute pending token to guess six-digit codes until one succeeds, obtaining a full access token.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| planka | planka | 2.2.0 – ≤ 2.2.1 | — |
References
- Patch Commit patch
- verify-totp controller at v2.2.1 technical-description
- https://github.com/plankanban/planka product
- VulnCheck Advisory: PLANKA 2.2.0 through 2.2.1 TOTP Brute Force via verify-totp Endpoint third-party-advisory