Credential Replay

Definitions

1. Credential Replay is an attack technique in which an adversary reuses captured authentication material against another session, service, or time window. Defenders analyze it to understand prerequisites, affected trust boundaries, and likely telemetry, then reduce risk with layered controls such as validation, hardening, rate limits, segmentation, and high-quality logging for investigation and response.

   In plain English: Credential Replay is a way attackers abuse systems or trust relationships, and defenders counter it with better design, validation, monitoring, and layered controls.

   Example: "During the assessment, the team simulated Credential Replay against a staging service, confirmed the weakness with logs and telemetry, and then added tighter validation, safer defaults, and monitoring so the same technique would trigger an alert in production."

Related Terms

• Authentication
• OTP
• CORS Preflight
• DAST
• Active Directory
• Authentication Bypass
• Credential Harvesting
• Credential Manager
• Multi-Factor Authentication Bypass
• OAuth Token Theft
• PAM