CVE-2025-43930 in Hashview
Summary
by MITRE • 07/07/2025
Hashview 0.8.1 allows account takeover via the password reset feature because SERVER_NAME is not configured and thus a reset depends on the Host HTTP header.
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Analysis
by VulDB Data Team • 07/07/2025
The vulnerability identified as CVE-2025-43930 affects Hashview version 0.8.1 and represents a critical account takeover flaw stemming from improper configuration of the password reset functionality. This issue arises when the SERVER_NAME environment variable remains unconfigured within the application's deployment settings, creating a dangerous dependency on the HTTP Host header for password reset operations. The absence of a properly defined server name creates an attack surface where malicious actors can manipulate HTTP headers to gain unauthorized access to user accounts.
The technical root cause of this vulnerability lies in the application's reliance on the HTTP Host header for constructing password reset URLs and validation processes. When SERVER_NAME is not explicitly configured, the application defaults to using the Host header value directly in its reset mechanisms, which exposes the system to host header injection attacks. This configuration flaw allows attackers to craft malicious password reset requests that redirect users to attacker-controlled domains, effectively enabling unauthorized account compromise. The vulnerability manifests as a lack of proper input validation and sanitization of the Host header value, which should never be trusted for critical security operations without proper verification.
From an operational impact perspective, this vulnerability presents a severe risk to user account security and system integrity. Attackers can exploit this weakness to perform account takeovers by manipulating the Host header in password reset requests, potentially gaining access to sensitive user data, system resources, and privileges associated with compromised accounts. The attack vector is particularly dangerous because it requires minimal user interaction beyond clicking a malicious reset link, and the exploitation process can be automated at scale. Organizations using Hashview 0.8.1 are at risk of unauthorized access to their user base, potential data breaches, and loss of system trust and credibility.
Security mitigations for this vulnerability should focus on proper configuration management and input validation practices. The primary remediation involves explicitly setting the SERVER_NAME environment variable to a trusted value that cannot be influenced by external HTTP headers. Additionally, the application should implement strict validation of Host header values against known good configurations and reject any requests where the header contains unexpected or potentially malicious values. Organizations should also implement proper URL generation mechanisms that do not rely on user-supplied headers for critical security operations, following the principle of least privilege and defense in depth. This vulnerability aligns with CWE-20: Improper Input Validation and ATT&CK technique T1531: Account Access Removal, as it enables unauthorized access to user accounts through manipulation of authentication mechanisms. The fix requires configuration changes rather than code modifications, making it relatively straightforward to implement but critical for maintaining system security posture.