McDonald’s Data Breach Exposes Millions What Went Wrong
In July 2025, McDonald’s AI powered hiring platform McHire made headlines for all the wrong reasons. Security researchers discovered that millions of job applicant records were exposed and the root cause was shockingly simple: the use of weak default credentials and a lack of multifactor authentication MFA.
This breach serves as a powerful reminder that in today’s digital landscape credential hygiene is not optional, it is mission critical.
Breaking Down the Breach Default Passwords No MFA and API Flaws
Security researchers gained administrative access to McHire using the default username and password combination 123456. Without MFA in place attackers were able to freely navigate the system. An Insecure Direct Object Reference IDOR vulnerability allowed access to more than 64 million chat records including sensitive applicant information such as names, email addresses and phone numbers.
Further investigation revealed that some internal devices had also been infected with malware with stolen credentials dating back to 2019.
Why This Matters Credential Theft Is the Number One Cause of Data Breaches
According to the 2025 Verizon Data Breach Investigations Report DBIR a staggering 88 percent of attacks against basic web applications involved the use of stolen credentials. When major brands like McDonalds fall victim to basic credential failures it becomes clear that password based systems are not just outdated they are dangerous.
From Vulnerable to Unbreakable Why It Is Time to Go Passwordless
Password based security is not just outdated it is a liability. While modern alternatives like passkeys biometrics and hardware tokens offer better protection they often come with trade-offs: complex integrations, poor app compatibility and frustrating user experiences.
Unixi Universal SSO removes those barriers. Powered by patented Key Derived Authentication KDA our passwordless solution works across any browser based application with no code changes, no APIs and no cooperation needed from app vendors.
Unixi provides seamless cryptographically secure access without storing a single credential. That means
- Zero application integration required
- Universal coverage of browser based SaaS apps
- Nothing stored no passwords no shared secrets
- Instant deployment with zero user friction
This is passwordless authentication engineered to be universally invisible and built for the way you work today.
Final Thoughts Credential Hygiene Is No Longer Optional
The McDonald’s McHire breach could have been avoided with basic security hygiene. Do not let your organization become the next cautionary tale.
