Description

The login endpoint on the Mira cloud API accepts any format-valid string in the password field and returns a live active session token for the account matching the supplied email address. An attacker could use an email address to control cloud accounts and access hormone record information and account settings.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-11T22:18:55.017Z",
  "pubdate": "2026-08-11T22:18:55.017Z",
  "executiveSummary": "An authentication bypass vulnerability exists within the login endpoint of the Mira cloud API, impacting cloud account security and user data confidentiality. The vulnerability stems from improper input validation and authentication logic handling within the credential verification process. Specifically, the login mechanism accepts any format-valid string in the password field when paired with a target email address, successfully bypassing the intended verification checks and returning a live, active session token for the corresponding account.\nThe risk implications are critical, as malicious actors can exploit this flaw to execute unauthorized takeovers of arbitrary cloud accounts without possessing valid credentials. Successful exploitation grants attackers immediate access to sensitive user data, including private hormone record information and confidential account settings. The attack requires no prior authentication or specialized privileges, relying solely on knowledge of a valid target email address and network connectivity to the targeted cloud API endpoint. Remediation requires implementing robust cryptographic password verification, enforcing strict credential validation logic, and ensuring that authentication mechanisms reject invalid or arbitrary secrets during the login handshake.",
  "technicalDetails": "The vulnerability resides in the authentication and session management subsystem of the Mira cloud API login endpoint. The root cause of the security flaw is a fundamental failure in the credential validation logic, where the system incorrectly processes the authentication parameters submitted via the Hypertext Transfer Protocol (HTTP) POST request.\nDuring standard authentication flows, the server is expected to compute a cryptographic hash of the incoming password parameter and securely compare it against a stored, salted hash associated with the provided email identifier in the backend database. However, in the vulnerable implementation, the server fails to properly validate the authenticity or correctness of the secret supplied in the password field. As long as the input string satisfies baseline formatting requirements, the authentication routine evaluates the condition as a successful match.\nUpon receiving an arbitrary, format-valid password string alongside a targeted email address, the vulnerable endpoint bypasses credential verification entirely. The server proceeds to generate and issue a live, active session token authorizing access to the specified account. This eliminates the need for brute-force enumeration, credential stuffing, or password cracking techniques.\nThe attack flow proceeds as follows: First, the attacker identifies a valid user email address associated with the target system. Second, the attacker formulates an HTTP request directed at the Mira cloud API login endpoint, supplying the target email and an arbitrary string as the password value. Third, the API processes the request, fails to authenticate the password against the backend identity store, yet incorrectly authorizes the session. Fourth, the API responds with a valid, active session token granting full authenticated access to the target account. Finally, the attacker leverages the acquired session token to interact with the API, extracting sensitive physiological data such as hormone record information and modifying critical account settings."
}