CVE-2024-5386 is a critical security vulnerability identified in lunary-ai/lunary version 1.2.2. The flaw is categorized under CWE-1125 (Excessive Attack Surface), where a user assigned the 'viewer' role, which is typically a low-privilege role, can exploit the system to hijack other users' accounts. The vulnerability stems from the server's improper handling of password reset requests. Specifically, when a viewer role user sends a crafted request, the server responds with a password reset token in the 'recoveryToken' parameter that corresponds to another user's account. Possession of this token allows the attacker to reset the victim's password without authorization, effectively taking over the account. This attack vector requires no user interaction and can be executed remotely over the network, making it highly exploitable. The vulnerability impacts confidentiality and integrity severely, as attackers gain unauthorized access to user accounts and can manipulate sensitive data. The excessive attack surface is due to insufficient access control on the password reset token generation and disclosure mechanism, allowing privilege escalation from viewer to full account control. Although no known exploits are reported in the wild yet, the high CVSS score (9.6) indicates critical severity. The vulnerability affects all unspecified versions of lunary-ai/lunary, with version 1.2.2 confirmed vulnerable. No patches are currently linked, emphasizing the need for immediate vendor response and user mitigation.

For European organizations using lunary-ai/lunary, this vulnerability poses a significant risk of account hijacking, leading to unauthorized access to sensitive data and systems. Attackers exploiting this flaw can escalate privileges from a low-privilege viewer role to full account control, potentially compromising confidential information and disrupting business operations. The lack of user interaction and network-based exploitability increases the likelihood of automated or targeted attacks. Organizations in sectors such as finance, healthcare, government, and critical infrastructure that rely on lunary-ai/lunary for collaboration or data management could face data breaches, regulatory non-compliance, and reputational damage. The vulnerability could also facilitate lateral movement within networks, enabling attackers to compromise additional systems. Given the critical severity, the impact extends beyond individual accounts to organizational security posture and data integrity.

1. Immediately restrict access to password reset functionality to trusted roles only, ensuring that low-privilege users like 'viewer' cannot trigger password reset token generation for other accounts. 2. Implement strict server-side validation and authorization checks to confirm that password reset tokens are only issued to legitimate requesters for their own accounts. 3. Monitor logs for unusual password reset requests originating from viewer role users or other low-privilege accounts. 4. Employ multi-factor authentication (MFA) on all user accounts to reduce the impact of compromised credentials. 5. Isolate and segment systems running lunary-ai/lunary to limit lateral movement in case of compromise. 6. Engage with the vendor for timely patches or updates addressing this vulnerability and apply them as soon as available. 7. Conduct internal security audits and penetration testing focusing on access control and token management mechanisms. 8. Educate users about phishing and social engineering risks that could compound the vulnerability exploitation. 9. Consider implementing rate limiting and anomaly detection on password reset endpoints to detect and block abuse attempts.