| Package | Affected versions | Patched versions |
|---|---|---|
| doorkeeper | < 4.2.0 | 4.2.0 |
| doorkeeper | ≤ 4.1.0 |
The Doorkeeper gem before 4.2.0 for Ruby might allow remote attackers to conduct replay attacks or revoke arbitrary tokens by leveraging failure to implement the OAuth 2.0 Token Revocation specification.
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