| Package | Affected versions | Patched versions |
|---|---|---|
| yubikey one time password validation server | < 2.40 | 2.40 |
The sync endpoint in YubiKey Validation Server before 2.40 allows remote attackers to replay an OTP. NOTE: this issue is potentially relevant to persons outside Yubico who operate a self-hosted OTP validation service with a non-default configuration such as an open sync pool; the issue does NOT affect YubiCloud.
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