CVE-2026-9228: MotoPress Timetable Plugin IDOR Vulnerability – Unauthorized Draft Post Access

Technical summary

CVE-2026-9228 is an Insecure Direct Object Reference (IDOR) vulnerability in the Timetable and Event Schedule by MotoPress plugin affecting all versions through 2.4.16. The flaw exists in the action_get_event_data function, which fails to implement adequate authorization checks on user-controlled key parameters. An authenticated attacker with contributor-level privileges or above can enumerate timeslot IDs and retrieve unserialised WP_Post objects containing sensitive fields (post_content, post_excerpt, post_status, post_author) from draft, pending, and private custom post types (mp-event). The vulnerability is classified as CWE-639 (Authorization Bypass Through User-Controlled Key).

Business impact

This vulnerability creates a confidential information disclosure risk within WordPress sites using the affected plugin. Content editors, draft posts, and private event schedules can be exposed to users who should not have viewing rights. For organizations using this plugin to manage sensitive event scheduling or content workflows, unauthorized access could compromise editorial control, expose unreleased announcements, or leak internal planning details. The impact is heightened in multi-author environments where role-based content separation is relied upon for governance.

Affected systems

WordPress installations with the Timetable and Event Schedule by MotoPress plugin installed in any version up to and including 2.4.16 are affected. Only sites where one or more users hold contributor-level access or higher (contributors, authors, editors, administrators) can be exploited. Sites without contributors or lower-privileged authors remain unaffected because the vulnerability requires authenticated access at that privilege level or above.

Exploitability

Exploitation requires valid WordPress account credentials with at least contributor-level permissions. No user interaction or special network conditions are required; the attacker can directly invoke the vulnerable action from their authenticated session. The attack is straightforward: an authenticated contributor can call the action_get_event_data function with manipulated parameters to enumerate and retrieve post objects they lack authorization to view. The barrier to exploitation is low for anyone with legitimate site access at contributor tier or above, but external attackers would first need to compromise or create a valid account.

Remediation

Update the Timetable and Event Schedule by MotoPress plugin to a version beyond 2.4.16 that includes proper authorization validation in the action_get_event_data function. Verify against the vendor's official advisory for the specific patched version number. Until patching is possible, restrict contributor-level access to only trusted users and review existing contributor accounts for necessity. Consider implementing additional access controls at the WordPress level or temporarily disabling the plugin if it is not essential.

Patch guidance

Check the MotoPress official plugin repository or vendor advisory for the release notes detailing the security fix. Download and install the latest version of the plugin via the WordPress admin interface or manually. Test in a staging environment first to ensure compatibility with your theme and other plugins. Apply the update during a scheduled maintenance window. After patching, verify via plugin audit logs or site activity that no unauthorized data access occurred during the vulnerability window.

Detection guidance

Review WordPress user access logs and audit plugins for calls to the action_get_event_data function, especially those with unusual or repeated parameter variations. Look for patterns where contributors are accessing post objects that differ from their normal workflow. Check wp-event post metadata and revision histories for unexpected queries. Enable WordPress debugging if needed and monitor for direct function calls within authenticated sessions. A Web Application Firewall (WAF) rule set can flag suspicious requests to the vulnerable action endpoint if parameter patterns suggest enumeration attempts.

Why prioritize this

Although the CVSS score is medium (4.3), this vulnerability warrants prompt attention in environments with multi-user WordPress sites. The barrier to exploitation is low for any authenticated contributor, and the exposure includes sensitive post metadata. Multi-author sites, news organizations, and agencies managing private or draft content should prioritize patching to maintain editorial workflow integrity. Organizations with strict role-based content separation policies should treat this as higher priority than the base score suggests.

Risk score, explained

The CVSS 3.1 score of 4.3 reflects a network-accessible vulnerability with low attack complexity and low privilege requirements (authenticated contributor). The impact is confidentiality loss only (no integrity or availability impact). The score does not fully capture organizational risk in scenarios where draft content, private schedules, or editorial workflows are business-critical, or where multi-author separation is a compliance requirement. Organizations should adjust their internal risk rating based on their reliance on confidentiality of unpublished content and the number of trusted contributors on their sites.

Frequently asked questions