Why do traditional onboarding methods increase the risk of credential theft and social engineering?

Traditional onboarding creates risk because the initial password is handled by too many people and too many channels. Email, text, paper, spreadsheets, and informal handoffs all increase the chance of interception, reuse, or insider exposure. Once the password leaves a controlled identity verification flow, attackers and accidental leaks can compromise the account before first login.

Why Traditional Onboarding Creates a Bigger Attack Surface

Traditional onboarding increases credential theft and social engineering risk because it turns first access into a people-and-process problem instead of a controlled identity event. When a password is sent by email, text, paper, spreadsheet, or verbal handoff, the organisation creates extra interception points, extra chances for reuse, and extra opportunities for an attacker to pose as IT, HR, or a manager. The weak point is not only the password itself, but the trail of handling around it. In the 2024 Non-Human Identity Security Report, 23.7% of organisations said they share secrets through insecure methods such as email or messaging applications, which shows how normalised unsafe handoffs still are.

Attackers do not need to break strong authentication if they can exploit the delivery process before the user ever signs in. A convincing reset notice, “temporary access” instruction, or duplicate onboarding message can be enough to capture the initial secret or steer the new hire into a fraudulent portal. In practice, many security teams discover this failure only after the account has already been enrolled in the wrong channel or the first password has already been disclosed.

How the Risk Shows Up in Real Onboarding Flows

The risk grows when onboarding is fragmented across HR, IT, managers, recruiters, and contractors, because each handoff becomes a chance to expose the credential or mislead the recipient. The best control is not a better password email; it is removing the need to distribute a reusable initial secret at all. Modern onboarding should push users into verified identity proofing, one-time enrollment, or controlled reset flows that do not reveal the credential to intermediaries.

This is also where social engineering becomes easier. New employees are more likely to trust instructions, move quickly, and accept unusual steps as “normal onboarding.” If the process allows manual overrides, shared mailboxes, or unverified support calls, attackers can exploit urgency and uncertainty rather than technical weakness. For teams handling reusable secrets at scale, the Ultimate Guide to NHIs — Static vs Dynamic Secrets is useful because it explains why short-lived, tightly scoped secrets are less exposed than long-lived shared ones.

Use verified identity proofing before access is issued.
Deliver first access through a one-time enrollment path, not a visible password handoff.
Keep HR, IT, and manager communications aligned so attackers cannot imitate the “next step.”
Avoid reusable initial passwords, shared inboxes, and informal spreadsheet tracking.

When onboarding depends on people forwarding secrets or confirming access by message, the process breaks down as soon as one channel is spoofed, one mailbox is compromised, or one helper bypasses the approved flow.

Common Variations and Edge Cases

Tighter onboarding controls often add friction, so organisations must balance speed against exposure. Contractor onboarding, seasonal hiring, and merger-related provisioning are the most common edge cases because they tempt teams to use temporary shortcuts that later become the default.

Best practice is evolving, but the guiding principle is stable: the more distributed the first-secret process, the easier it is to steal or impersonate. A paper handoff may seem safe in a small office, yet it becomes brittle once remote workers, delegated administrators, or external recruiters are involved. The same is true for recovery questions, which often look harmless but are easy to social-engineer when the attacker already knows the new hire’s role, start date, or manager.

For identity programs that need a broader framework perspective, the OWASP Non-Human Identity Top 10 reinforces the value of eliminating exposed, reusable credentials across onboarding-like trust flows, while NIST SP 800-63 Digital Identity Guidelines is useful when the onboarding step depends on identity proofing and verifier trust. When a process still requires humans to pass around a password, it is usually safer to redesign the enrollment path than to try to train every intermediary to resist phishing forever.

Risk and Threat Considerations

Traditional onboarding creates a material exposure window because the first credential often exists before the account is fully under the user’s control. That makes the onboarding chain attractive to both opportunistic attackers and internal misuse, especially when multiple handlers, duplicate notices, or informal support channels are involved.

Failure mechanism: The weakness materialises when a reusable initial secret is transmitted through channels that can be intercepted, spoofed, forwarded, or observed by bystanders. Social engineers then imitate HR, IT, or a manager to redirect the new hire, capture the secret, or trigger an unsafe reset before the legitimate user ever authenticates.

Impact: The result can be account takeover on first use, unauthorized access to internal systems, replay of the same secret in other services, or a broader trust failure in onboarding and help-desk workflows.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

CIS Controls v8 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.

Framework	Control / Reference	Relevance
CIS Controls v8	5 — Account Management	Onboarding controls account issuance and exception paths that can expose first credentials.
	6 — Access Control Management	The question concerns who can access accounts and how initial access is granted safely.
	14 — Security Awareness and Skills Training	Social engineering succeeds when users and helpers are not conditioned to verify onboarding requests.
Recommendation — Centralise account issuance and remove manual credential handoffs from onboarding. Enforce least-privilege enrollment and restrict onboarding resets to approved roles. Train staff to verify onboarding requests through approved channels before sharing access.
NIST CSF 2.0	PR.AA — Identity Management, Authentication, and Access Control	Onboarding is fundamentally an identity proofing and access-granting problem.
	PR.AT — Awareness and Training	The threat depends on phishing and impersonation during the onboarding workflow.
	PR.DS — Data Security	Initial passwords and recovery data are sensitive information that must be protected in transit and handling.
Recommendation — Use controlled identity proofing and remove visible password delivery from enrollment. Train onboarding participants to challenge unsolicited credential requests and verification changes. Protect onboarding secrets from exposure by eliminating insecure transmission channels.

Practitioner Guidance

What to prioritise: Remove any step that requires a human to see, forward, or verbally confirm a reusable initial password. If the process still depends on secret handoff, treat it as a high-risk onboarding design, not a training problem.

What to verify: Confirm that the first access path is one-time, identity-verified, and auditable end to end. Verify who can resend, reset, or override onboarding credentials, because those exception paths are often the easiest social-engineering target.

Common mistake: Teams often harden the password policy while leaving the delivery process untouched. That creates a false sense of safety, because the attacker usually targets the channel, not the complexity of the secret.

Practitioner takeaway: The safest onboarding design is the one that never asks a person to distribute a credential that would be dangerous if copied, forwarded, or spoofed.