CVE-2026-93661 Overview
CVE-2026-93661 affects the Events Manager WordPress plugin in versions prior to 7.4.5. The plugin fails to prevent a ticket-update request from replacing the identifiers of the ticket it was authorized against. A user with permission to manage tickets for one event can overwrite and reassign any ticket on the site to their own event. The flaw is classified as an Insecure Direct Object Reference [CWE-639] and requires an authenticated account with ticket management privileges.
Critical Impact
An authenticated event manager can hijack tickets belonging to any other event on the WordPress site, corrupting event data integrity.
Affected Products
- Events Manager WordPress plugin versions before 7.4.5
- WordPress sites permitting multiple event managers
- Deployments exposing the plugin's ticket-update endpoint
Discovery Timeline
- 2026-09-24 - CVE-2026-93661 published to NVD
- 2026-09-24 - Last updated in NVD database
Technical Details for CVE-2026-93661
Vulnerability Analysis
The Events Manager plugin exposes a ticket-update workflow used by users authorized to manage tickets for events they own. The update handler authorizes the request against the ticket identifier submitted at the start of the transaction. However, the handler then accepts a client-supplied identifier field in the update payload and writes it to the database without revalidating ownership.
An authenticated user with rights over one event can therefore submit an update that changes the target ticket's identifier to point at a ticket owned by another event. The write succeeds because the authorization check and the persisted identifier are decoupled. The result is unauthorized modification and reassignment of ticket records across event boundaries.
Root Cause
The root cause is a missing authorization check on the object identifier included in the request body. The plugin trusts client-supplied identifiers during update operations rather than binding the write to the originally authorized ticket. This pattern matches Authorization Bypass Through User-Controlled Key [CWE-639].
Attack Vector
Exploitation requires an authenticated account with ticket management rights over at least one event. The attacker submits a crafted ticket-update request over the network, supplying the identifier of a ticket belonging to another event. No user interaction is required. Impact is limited to integrity of ticket records; confidentiality and availability are not directly affected.
No public proof-of-concept code is available. See the WPScan Vulnerability Report for additional technical details.
Detection Methods for CVE-2026-93661
Indicators of Compromise
- Ticket records whose associated event identifier changes without a corresponding administrative action.
- Tickets appearing under events whose managers should not have visibility into them.
- Repeated POST requests to the plugin's ticket-update endpoint originating from a single authenticated user targeting varied ticket identifiers.
Detection Strategies
- Audit the plugin's ticket tables for identifier drift between ticket rows and their expected parent events.
- Enable WordPress action logging to capture ticket create, update, and delete events with the acting user identifier.
- Correlate web server access logs with authenticated session identifiers to flag users updating tickets outside their assigned events.
Monitoring Recommendations
- Alert on any ticket-update request where the submitted ticket identifier differs from the identifier bound to the current editing session.
- Track privilege usage for accounts holding the event manager role and review changes to ticket ownership on a scheduled cadence.
- Forward WordPress and web server logs to a centralized analytics platform for cross-event correlation.
How to Mitigate CVE-2026-93661
Immediate Actions Required
- Update the Events Manager plugin to version 7.4.5 or later on all WordPress sites.
- Review event manager account assignments and remove accounts that no longer require ticket management rights.
- Audit ticket ownership records to identify and revert any unauthorized reassignments made prior to patching.
Patch Information
The vendor addressed CVE-2026-93661 in Events Manager version 7.4.5. The fix binds the ticket-update operation to the originally authorized ticket identifier rather than the client-supplied value. Refer to the WPScan Vulnerability Report for advisory details.
Workarounds
- Restrict the event manager role to trusted users until the plugin is updated.
- Place the WordPress administrative interface behind an IP allow-list or reverse proxy to reduce exposure of the ticket-update endpoint.
- Take a full database backup so unauthorized ticket reassignments can be identified and rolled back.
# Update the Events Manager plugin using WP-CLI
wp plugin update events-manager --version=7.4.5
wp plugin list --name=events-manager --fields=name,status,version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
