CVE-2026-6915 in Server
Summary
by MITRE • 04/29/2026
An authorization flaw in the user management command could allow an authenticated user to make limited changes to authentication-related data associated with another user account. This could affect how authentication is performed for the impacted account.
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Analysis
by VulDB Data Team • 07/04/2026
This vulnerability represents a critical authorization flaw that undermines the fundamental security principles of access control and user isolation within authentication systems. The issue manifests as a privilege escalation opportunity where authenticated users can manipulate authentication-related data belonging to other accounts, creating potential pathways for unauthorized access or account takeover scenarios. Such flaws directly violate the principle of least privilege and can be classified under CWE-285, which encompasses improper authorization issues in software systems.
The technical implementation of this vulnerability typically stems from insufficient input validation and inadequate access control checks within user management commands. When users execute administrative functions without proper verification of their权限 to modify target accounts, the system fails to enforce mandatory access controls that should prevent one user from accessing or modifying another user's authentication parameters. This weakness often occurs in scenarios where the system relies on user-provided identifiers without cross-checking whether the authenticated user possesses legitimate authorization to perform such operations.
The operational impact of this vulnerability extends beyond simple data modification, potentially enabling attackers to reset passwords, modify authentication tokens, or alter account permissions that could lead to full system compromise. An attacker with access to a low-privilege account could exploit this flaw to gain elevated privileges or impersonate other users within the system. This type of vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through legitimate user credentials.
Mitigation strategies should focus on implementing robust access control mechanisms that enforce strict authorization checks before allowing any user management operations. Systems must validate that authenticated users have appropriate permissions to modify target accounts, typically through role-based access controls or attribute-based access control models. Additionally, comprehensive logging and monitoring of user management activities can help detect unauthorized attempts to manipulate other users' authentication data. The implementation of defense-in-depth measures including multi-factor authentication and regular security audits further reduces the risk exposure from such authorization flaws.