Microsoft internal analytics platform exposed by a 16-year-old security researcher using an unsigned token and admin username
A 16-year-old security researcher named Faav gained administrative access to Microsoft’s internal analytics platform, Titan, by exploiting an unsigned authentication token and standard default credentials, Xataka reported. The security flaw exposed metadata from approximately 25,000 accounts, 17,990 employee emails, and 24,569 internal dashboards across 17 connected analytical databases.
Discovery of the Titan API vulnerability on Azure
The security assessment began on August 25, when Faav and an AI tool named Antares located the Titan API hosted on an Azure server without external protection beyond obscurity, according to Xataka. Antares spent ten days testing token variations before determining that the server accepted authentication tokens lacking a digital signature. Because the server failed to recognize a valid user profile within the token, the researcher manually substituted the default username field with “admin.” Titan accepted the input as a local administrator role, allowing the execution of SQL queries with elevated privileges.
Scale of exposed metadata and bounty payout
The unauthorized session exposed massive internal metrics, including an estimated 17.3 billion rows of data derived from platform metadata, historical logs, and duplicates, alongside two single-row data samples from Bing. Faav reported the vulnerability to the Microsoft Security Response Center on September 5. Microsoft revoked access to the API on September 9 and issued a $5,000 bug bounty payment to the researcher on September 17. The researcher documented these findings on his personal blog, a text that Microsoft reviewed prior to its publication.
Historical context of JWT vulnerabilities
The vulnerability underscores a long-standing issue with token verification. Security risks involving libraries that accept tokens without specified algorithms have been documented since 2015, when researcher Tim McLean demonstrated the flaw. Five years later, the Internet Engineering Task Force (IETF) published security best practices for the JSON Web Token standard. Despite these established guidelines, the oversight remains a recurring challenge in the industry, which researchers currently track with a “Hype-O-Meter” rating of 6.5/10 for incidents occurring in 2026.
Frequently Asked Questions
What specific security failure allowed access to the Titan platform?
The Titan server checked the contents of incoming authentication tokens for parameters like tenant and application ID, but it failed to validate the cryptographic signature itself. Official Azure Application Gateway documentation explicitly requires validation of token signatures, issuers, audiences, and expiration dates.
Did the security breach compromise live customer information?
The researcher confirmed that the incident did not impact active customer data. Exposure remained restricted to internal employee metadata, system dashboards, and isolated internal testing samples.
How did the AI tool Antares contribute to finding the flaw?
Antares automated the repetitive process of testing token variations against the Azure host over a ten-day period. The decision to substitute the default username with “admin” was made directly by the human researcher rather than the AI.
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