Horizon Alert
Summary of the vulnerability and why it matters
A broken authentication vulnerability in the password-recovery process of the Netherman Portal del Hermano allows attackers to take over any member account. By exploiting how the system confirms identity factors, an attacker could reroute password reset links to their own email and gain full access to user profiles, financial information, and fiscal documents.
- Account takeover via password reset flaw.
- Confirms member account, data, and document access.
- Confirm relevance and exposure to critical systems.
Attack Path
How an attacker could exploit the issue
An attacker can take over any user account on Netherman Portal del Hermano by exploiting flaws in the password recovery process. This process requires no authentication, but attackers must be able to send requests to the affected endpoints. By carefully observing error messages, an attacker can confirm a user's DNI, then brute-force their date of birth and IBAN digits. Combining this with information gathered through open-source intelligence, such as a user's phone number, allows the attacker to submit an email address they control, redirecting the password reset link and enabling full account takeover.
- No authentication is required.
- Exploits password reset validation.
- Enables full account takeover.
Live Threat
Current exploitation, exposure, and threat context
A broken authentication vulnerability in the password-recovery flow could allow unauthenticated attackers to take over member accounts across all tenants. This is possible by exploiting a lack of rate limiting and distinct error messages that reveal information about identity verification factors. An attacker could confirm a DNI, brute-force other factors, and then redirect the password reset link to their own email, enabling full account takeover.
- Member account data and financial information.
- Via password reset process exploitation.
- Unauthorized access and data compromise.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in the Netherman Portal del Hermano's password recovery impacts account security and is likely a shared responsibility. The platform or application owner should first identify all instances of the affected portal, confirm its reachability and criticality, and then collaborate with security and infrastructure teams to validate exposure and plan remediation.
- Application owners and platform teams.
- Verify portal reachability and criticality.
- Plan remediation based on confirmed risk.
