Vulnerability Overview (At a Glance)

• CVE ID: CVE-2026-24540
• Vulnerability Type: Missing Authorization / Broken Access Control
• Affected Component: Integrate Google Drive (WordPress plugin)
• Affected Versions: All versions up to and including 1.5.5
• Fixed Version: 1.5.6
• CVSS v3.1 Score: 5.4 (Medium)
• Severity (Operational View): Medium, with potential for high impact in real-world environments
• Exploitability: Moderately easy once an authenticated low-privilege account exists
• Exploit Availability: No fully weaponized public exploit released; exploitation is feasible and reproducible for educational and testing purposes
• Authentication Required: Yes (low-privilege WordPress user, e.g., Subscriber)
• User Interaction: None
• Impact: Full administrative control of the WordPress site may be obtained

Official Patch / Upgrade Link

• WordPress Plugin Page – Integrate Google Drive (update to v1.5.6):
  https://wordpress.org/plugins/integrate-google-drive/

Detailed Vulnerability Description

A missing authorization flaw was identified in the Integrate Google Drive WordPress plugin. Due to insufficient capability and role validation, certain internal plugin functions were exposed to authenticated users without verifying whether the requester had the required administrative privileges.

As a result, a logged-in user with minimal permissions (such as a Subscriber) could invoke sensitive plugin actions that should have been restricted to administrators only. These actions may include modifying plugin configuration, interacting with Google Drive integrations, or triggering administrative-level operations within the WordPress environment.

Because authorization checks were either incomplete or entirely absent, the plugin trusted requests based solely on authentication rather than authorization. This violated the principle of least privilege and opened the door to privilege escalation.

How the Vulnerability Could Be Exploited

The vulnerability could be exploited once a low-privileged WordPress account was obtained. No bypass of authentication was required.

From a defensive understanding perspective, exploitation would typically involve:

• Logging in as a low-privileged user (Subscriber or similar).
• Sending crafted HTTP requests to plugin-specific endpoints (such as AJAX handlers or REST endpoints).
• Triggering functions that performed administrative actions without validating user capabilities.
• Leveraging those actions to escalate privileges, modify site configuration, or create persistent administrator access.

If successfully exploited, the attacker could gain full administrative control over the WordPress site, effectively leading to complete site compromise.

Proof of Concept (PoC) – Educational

At the time of disclosure, no fully weaponized exploit framework or mass-exploitation tool was publicly released. However, the vulnerability is considered practically exploitable.

For educational and defensive testing purposes, a proof-of-concept would generally demonstrate:

• A low-privilege authenticated session.
• Direct invocation of plugin functionality that should normally be gated by manage_options or equivalent WordPress capabilities.
• Successful execution of an administrative action without proper authorization checks.

Potential Impact

If exploited, the following outcomes could occur:

• Unauthorized creation or modification of administrator accounts
• Full takeover of the WordPress dashboard
• Modification of site settings and security controls
• Unauthorized access to Google Drive files linked via the plugin
• Installation of malicious plugins or themes
• Establishment of persistence mechanisms (backdoor admin users)

In shared hosting or multi-site environments, the business impact could be severe due to reputational damage and data exposure.

MITRE / Security Framework Mapping

• CWE: CWE-862 – Missing Authorization
• OWASP Top 10: A01 – Broken Access Control
• MITRE ATT&CK (Conceptual Mapping):
  • Privilege Escalation
  • Abuse of Valid Accounts

These mappings are relevant for threat modeling, detection engineering, and incident response planning.

Detection and Monitoring Guidance

Relevant Log Sources

To detect attempted or successful exploitation, the following log sources should be monitored:

• Web server access logs (Apache / Nginx)
• WordPress audit or activity logs
• WordPress REST API and admin-ajax logs
• Authentication and user management logs
• Google OAuth or API access logs (if Drive integration is active)

Indicators of Suspicious Activity

• Administrative actions performed by non-admin users
• Creation of new administrator accounts without change approval
• Role changes initiated by Subscriber or Contributor accounts
• Plugin settings modified outside normal admin activity windows
• Repeated calls to plugin-related endpoints from low-privilege users

Detection Logic

Rule Example 1 – Privilege Abuse

• Trigger when a non-admin user performs:
  • User creation
  • Role modification
  • Plugin configuration changes

Rule Example 2 – Suspicious Endpoint Usage

• Trigger when plugin-related AJAX or REST endpoints are accessed using:
  • POST, PUT, or DELETE methods
  • A user role that is not Administrator

Rule Example 3 – Behavioral Anomaly

• Trigger when a Subscriber account initiates actions typically associated with site administration.

These rules should be adapted to the organization’s SIEM or log analysis platform.

Recommended Mitigations

• Upgrade the plugin immediately to version 1.5.6 using the official WordPress plugin page.
• If patching is not immediately possible, temporarily deactivate the plugin.
• Audit all WordPress user accounts and remove unused or suspicious users.
• Enforce strong authentication controls (MFA) for administrator accounts.
• Review historical logs for signs of privilege escalation or unauthorized changes.
• Rotate Google API credentials and OAuth tokens if compromise is suspected.

Incident Response Considerations

If exploitation is suspected:

• The affected plugin should be disabled immediately.
• Administrator credentials should be reset.
• Newly created admin accounts should be reviewed and removed if unauthorized.
• Site integrity should be verified using known-good backups.
• A full security review should be conducted before returning the site to production.

Final Takeaway

While this vulnerability is rated as Medium by CVSS standards, its real-world impact can be high in environments where user registrations are open or poorly monitored. Prompt patching, proper logging, and continuous monitoring are essential to reducing risk.