CVE-2025-61132 is a Host Header Injection vulnerability found in the password reset component of levlaz braindump version 0.4.14. The vulnerability stems from the use of Flask's url_for function with the _external=True parameter to generate absolute URLs for password reset links without a fixed SERVER_NAME configuration in the Flask application. This misconfiguration allows an attacker to manipulate the Host header in HTTP requests, causing the application to generate password reset URLs with attacker-controlled domains or hosts. Consequently, an attacker can craft malicious password reset links that redirect victims to attacker-controlled sites or intercept password reset tokens, enabling password reset poisoning and potentially full account takeover. The flaw exploits the trust the application places on the Host header, which is user-controllable and not validated properly. This vulnerability affects the confidentiality and integrity of user accounts by allowing unauthorized password resets. No known exploits have been reported in the wild, and no official patches or CVSS scores are currently available. The vulnerability highlights the importance of setting a fixed SERVER_NAME in Flask applications or validating Host headers to prevent injection attacks. Organizations using levlaz braindump or similar Flask-based applications should review their configurations and update their applications accordingly to mitigate this risk.

For European organizations, exploitation of CVE-2025-61132 could lead to unauthorized account takeovers, resulting in loss of user data confidentiality and integrity. Attackers could reset passwords of legitimate users, gaining access to sensitive information or internal systems if levlaz braindump is used for critical knowledge management or documentation. This could disrupt business operations, damage reputation, and lead to compliance violations under GDPR due to unauthorized access to personal data. The impact is particularly significant for organizations relying on levlaz braindump for managing sensitive or proprietary information. Additionally, phishing campaigns could leverage poisoned reset links to harvest credentials or deploy malware. The absence of known exploits suggests a window of opportunity for defenders to remediate before widespread attacks occur. However, the ease of exploitation via simple Host header manipulation and the remote nature of the attack vector increase the risk profile. Organizations with public-facing instances of levlaz braindump are especially vulnerable.

To mitigate CVE-2025-61132, organizations should immediately configure the Flask application's SERVER_NAME setting to a fixed, trusted domain name, preventing url_for(_external=True) from generating URLs based on untrusted Host headers. If SERVER_NAME configuration is not feasible, implement strict validation and sanitization of the Host header to reject or ignore unexpected values. Review and update the password reset component to ensure reset links are generated securely and tokens are bound to the intended domain. Monitor application logs for unusual Host header values or suspicious password reset requests. Apply any available patches or updates from levlaz braindump maintainers as soon as they are released. Additionally, implement multi-factor authentication (MFA) to reduce the impact of potential account takeovers. Conduct security testing focused on header injection and URL generation logic. Educate users to recognize phishing attempts involving password reset links. Finally, consider deploying web application firewalls (WAFs) with rules to detect and block Host header injection attempts.