CVE-2026-1981 in HUMN-1 AI Website Scanner & Human Certification by Winston AI Plugin
Summary
by MITRE • 03/07/2026
The HUMN-1 AI Website Scanner & Human Certification by Winston AI plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the winston_disconnect() function in all versions up to, and including, 0.0.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to reset the plugin's API connection settings via the 'winston_disconnect' AJAX action.
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Analysis
by VulDB Data Team • 03/08/2026
The vulnerability identified as CVE-2026-1981 affects the HUMN-1 AI Website Scanner & Human Certification plugin for WordPress, specifically targeting versions 0.0.3 and earlier. This issue stems from a critical authorization flaw within the plugin's codebase that fails to implement proper capability validation before executing sensitive operations. The vulnerability resides in the winston_disconnect() function which handles the disconnection of the plugin's API connection settings through an AJAX endpoint. Attackers with Subscriber-level privileges or higher can exploit this weakness to manipulate the plugin's configuration, potentially compromising the security posture of WordPress installations that rely on this particular scanning solution.
The technical flaw manifests as a missing capability check in the winston_disconnect() function, which operates without verifying whether the requesting user possesses sufficient permissions to perform the disconnection action. This represents a clear violation of the principle of least privilege and directly aligns with CWE-732: Incorrect Permission Assignment for Critical Resource. The vulnerability exists because the plugin fails to validate user capabilities before processing the 'winston_disconnect' AJAX action, allowing unauthorized modification of plugin settings through legitimate administrative interfaces. The absence of proper access control validation creates a path for privilege escalation and unauthorized data manipulation within the WordPress environment.
From an operational perspective, this vulnerability enables authenticated attackers to reset API connection settings for the HUMN-1 plugin, potentially disrupting legitimate security operations and creating opportunities for further exploitation. The impact extends beyond simple configuration changes as the ability to reset API connections could be used to disable security monitoring capabilities or redirect connections to malicious endpoints. This vulnerability particularly affects WordPress installations where the plugin is actively used for website security scanning, as it provides attackers with the means to undermine the security infrastructure that the plugin is designed to provide. The compromised system may experience reduced security coverage or complete loss of functionality for the AI scanning capabilities, depending on how the API disconnection is exploited.
Security mitigations for this vulnerability should focus on immediate code remediation to implement proper capability checks before executing the winston_disconnect() function. The recommended approach involves adding a capability validation check using WordPress's built-in functions such as current_user_can() to ensure that only users with appropriate administrative privileges can access the AJAX endpoint. Additionally, implementing proper input sanitization and nonce verification for the AJAX action would further strengthen the security posture. Organizations should also consider implementing network-level monitoring to detect unusual patterns of API disconnection requests and maintain regular updates to ensure all WordPress plugins remain current with security patches. The vulnerability demonstrates the importance of following secure coding practices as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1078.004: Valid Accounts - Cloud Accounts, where compromised accounts with sufficient privileges can be leveraged to perform unauthorized modifications to security tools.