Description

Observable response discrepancy vulnerability in GastroMenum GastroMenum Web Panel allows Account Footprinting. This issue affects GastroMenum Web Panel: before 31.08.2026.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.5",
  "pubDate": "2026-09-04T15:17:33.360Z",
  "pubdate": "2026-09-04T15:17:33.360Z",
  "executiveSummary": "The GastroMenum Web Panel is susceptible to an observable response discrepancy vulnerability, which facilitates account footprinting. This vulnerability allows an unauthenticated remote attacker to distinguish between valid and invalid user accounts based on the application's response behavior.\nBy observing subtle differences in server-side responses—such as variations in HTTP status codes, error messages, or response latency during authentication attempts—an attacker can systematically enumerate registered accounts. This information gathering phase is a critical precursor to further attacks, including brute-force password guessing, credential stuffing, or targeted social engineering campaigns against legitimate users.\nThe vulnerability affects all versions of GastroMenum Web Panel prior to 31.08.2026. Given that the impact involves the exposure of sensitive user metadata, the risk level is significant for organizations relying on the platform for user identity management.\nExploitation does not require prior authentication, meaning it can be performed from any network-accessible position. Effective remediation requires standardizing server responses to prevent the leakage of account existence status during authentication processes.",
  "technicalDetails": "The vulnerability originates from a failure to implement uniform handling of authentication failures within the GastroMenum Web Panel's login or recovery endpoints. In a secure implementation, the system should return generic, non-informative responses that do not reveal whether a provided identifier (username or email) exists in the database.\nIn the context of this observable response discrepancy, the application exhibits differential behavior when processing input. For example, the system might return a specific error message such as 'User not found' versus 'Incorrect password,' or it might trigger a slight difference in response timing if a database lookup fails versus a password hashing routine being executed for a valid user. Attackers can leverage these distinct side channels to confirm the presence of specific usernames.\nThe attack flow follows a systematic enumeration methodology. An attacker prepares a list of target usernames or email addresses. Using an automated script, the attacker sends individual authentication requests to the web panel. By analyzing the resulting HTTP response headers, body content, and latency (measured in milliseconds), the attacker categorizes each response. Responses that deviate from the standard 'failed' response template indicate the presence of a valid account, while consistent responses suggest the account does not exist or the credential provided was incorrect for an existing account.\nThis vulnerability is classified as an enumeration side-channel. The lack of response normalization allows for automated bulk footprinting. Once the attacker has successfully mapped the target users, they gain a tactical advantage for subsequent attacks. The primary post-exploitation impact is the creation of a 'hit list' of valid accounts, which significantly lowers the barrier for automated brute-force attacks. By focusing efforts only on confirmed accounts, the attacker minimizes the risk of triggering account lockouts or security alerts associated with excessive failures against nonexistent accounts. The affected component is the authentication logic handler, which currently lacks the necessary abstractions to decouple user-existence checks from credential validation procedures across all network-exposed authentication interfaces."
}