Topic starter
11/08/2026 3:16 pm
TL;DR: Password vaults do not stop adversary-in-the-middle phishing when users can still copy and paste credentials or tokens into a fake login flow, according to Unixi. The core problem is not secret storage but human-readable secrets, which makes hidden authentication and phishing-resistant access the more durable control model.
Editorial analysis by NHI Mgmt Group, based on content published by Unixi: “The Toxic Asset in Your Tech Stack: Why Password Managers Can’t Stop Modern Phishing”.
Key questions
Q: What breaks when users can still copy credentials from a password vault?
A: The control breaks at the point of use, not at rest.
Q: Why do vaults and MFA still fail against adversary-in-the-middle phishing?
A: Because the attacker does not need to crack the vault or guess the password.
Q: How should security teams phase out copyable secrets without breaking access?
A: Start with the applications and user groups most exposed to phishing and session theft, then replace password-based sign-in with methods that do not expose a transferable secret.
Practitioner guidance
- Replace copyable secrets with phishing-resistant login flows Prioritise authentication methods that do not expose a password, OTP, or session token to the user during sign-in.
- Review where session tokens can be relayed Map authentication methods that still allow real-time proxying, especially legacy MFA and browser-based flows that hand back usable tokens after sign-in.
- Treat vaults as storage control, not assurance control Keep password vaults only as a transitional safeguard where needed, but do not count them as protection against AiTM phishing or user-mediated secret disclosure.
Bottom line: Password vaults reduce exposure at rest, but they do not stop a user from handing a secret to an attacker inside a fake login flow.
Explore further
View Full Forum → | NHI Foundation Course → | Our Services → | Read the full analysis →
11/08/2026 3:28 pm
Hidden authentication is a control model, not a cosmetic replacement for passwords: the core issue is that vaults still depend on human-readable secrets entering a browser session. Once a credential can be copied, typed, or relayed, it remains exposed to phishing mediation. The implication is that identity programmes must judge controls by transferability at use time, not by how well they store secrets at rest.
A few things that frame the scale:
- 73% of vaults are misconfigured, leading to unauthorised access and exposure of sensitive data, according to the Ultimate Guide to NHIs.
- Only 44% of organisations are currently using a dedicated secrets management system, according to the 2024 State of Secrets Management Survey.
A question worth separating out:
Q: What is the difference between secret vaulting and phishing-resistant authentication?
A: Secret vaulting protects how credentials are stored. Phishing-resistant authentication protects how access is proven. A vault can keep a password safe until a user reveals it, but a phishing-resistant method removes the useful secret from the user-facing flow, so there is nothing to copy into a fake page.
👉 Read our full editorial: Hidden authentication exposes the limits of password vault governance