WinPlus v24.11.27 Authentication Bypass: User Impersonation via CVE-2025-41346

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Overview

CVE-2025-41346 describes a critical authentication bypass vulnerability found in WinPlus v24.11.27, a software application developed by Informática del Este. This flaw allows an attacker to impersonate another user simply by knowing their numerical ID. Successfully exploiting this vulnerability grants the attacker unauthorized access to the victim’s account, compromising the confidentiality, integrity, and availability of the data stored within the application.

Technical Details

The vulnerability stems from a faulty authorization control mechanism within WinPlus v24.11.27. The application fails to adequately verify the identity of users during specific actions, relying solely on the user’s ‘numerical ID’ for authentication. An attacker can manipulate requests to use the numerical ID of another user, effectively bypassing the intended authentication process. This allows them to perform actions as that user, including accessing sensitive data, modifying settings, and potentially disrupting system operations.

CVSS Analysis

At the time of writing, a CVSS score has not been assigned for CVE-2025-41346. However, given the severity of the potential impact – complete user impersonation and data compromise – it is likely to be categorized as a High or Critical severity vulnerability once a CVSS score is determined. The lack of a current CVSS should not minimize the severity of this issue.

Possible Impact

The potential impact of CVE-2025-41346 is significant:

  • Account Compromise: Attackers can gain complete control of other users’ accounts.
  • Data Breach: Sensitive data stored within the application could be accessed and exfiltrated.
  • Data Manipulation: Attackers can modify or delete data, leading to data corruption and loss.
  • Service Disruption: Attackers can disrupt the normal operation of the application, causing downtime and affecting productivity.
  • Reputational Damage: A successful exploitation of this vulnerability could severely damage the reputation of Informática del Este and its customers.

Mitigation and Patch Steps

The primary mitigation strategy is to apply the security patch released by Informática del Este. Users of WinPlus v24.11.27 are strongly advised to:

  1. Immediately update to the latest version of WinPlus containing the fix for CVE-2025-41346. Contact Informática del Este support for patch availability and installation instructions.
  2. Monitor network traffic for suspicious activity that could indicate exploitation attempts.
  3. Review user access controls and ensure that only authorized personnel have access to sensitive data.
  4. Implement strong password policies and encourage users to use unique and complex passwords.
  5. Consider implementing multi-factor authentication (MFA) to add an extra layer of security. While MFA might not directly address this specific vulnerability, it can significantly reduce the risk of account compromise through other attack vectors.

References

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