CVE-2026-13174 Overview
CVE-2026-13174 affects the Eventin WordPress plugin in versions prior to 4.1.21. The plugin fails to verify ownership or capability before executing user account deletion operations. Authenticated users with contributor-level access or higher can permanently delete arbitrary user accounts, including administrators. This broken access control flaw maps to [CWE-284] and stems from missing authorization checks in the account deletion endpoint.
Critical Impact
A contributor-level attacker can permanently delete any WordPress user account, including administrators, resulting in loss of site content ownership, service disruption, and potential complete site takeover.
Affected Products
- Eventin WordPress plugin versions prior to 4.1.21
- WordPress installations running vulnerable Eventin releases
- Sites permitting contributor-level or higher registration
Discovery Timeline
- 2026-08-19 - CVE-2026-13174 published to NVD
- 2026-08-19 - Last updated in NVD database
Technical Details for CVE-2026-13174
Vulnerability Analysis
The Eventin plugin exposes functionality that deletes WordPress user accounts without verifying whether the requesting user has authorization to perform the action. WordPress access control conventions require the delete_users capability, typically reserved for administrators, before removing accounts. The vulnerable code paths in Eventin omit this check entirely.
An attacker holding contributor privileges can issue a crafted request specifying an arbitrary target user ID. The plugin processes the deletion without validating capability or ownership. The result is permanent removal of the target account and reassignment or loss of associated content.
This is a broken access control vulnerability rather than an input validation flaw. The endpoint likely relies solely on nonce or authentication checks while omitting the required WordPress capability verification through current_user_can(). See the WPScan Vulnerability Report for technical details.
Root Cause
The root cause is missing authorization enforcement. Eventin's user deletion handler does not call current_user_can('delete_users') or an equivalent capability check before invoking wp_delete_user(). Ownership validation against the target user ID is also absent.
Attack Vector
Exploitation requires authenticated access at contributor level or higher. The attacker sends an HTTP request to the vulnerable Eventin AJAX or REST endpoint with a target user ID parameter. No user interaction from the victim is required. Once the request is processed, the target account is permanently deleted from the WordPress database.
Refer to the WPScan Vulnerability Report for endpoint-specific exploitation details.
Detection Methods for CVE-2026-13174
Indicators of Compromise
- Unexpected wp_delete_user() calls in PHP error or audit logs originating from non-administrator sessions
- Missing administrator or editor accounts with no corresponding change ticket
- HTTP requests to Eventin plugin endpoints containing user ID parameters from contributor-level sessions
- Sudden reassignment of posts to a fallback author following account deletions
Detection Strategies
- Enable WordPress audit logging plugins to record every user deletion event with actor, target, and source IP
- Alert on any user deletion performed by an account without the delete_users capability
- Review Eventin plugin request logs for POST or DELETE traffic referencing user IDs
Monitoring Recommendations
- Monitor the wp_users table for unexpected row removals and correlate with web server access logs
- Track privilege changes and account deletions in real time through a SIEM ingesting WordPress logs
- Baseline normal contributor and author activity to surface anomalous administrative-style requests
How to Mitigate CVE-2026-13174
Immediate Actions Required
- Update the Eventin plugin to version 4.1.21 or later on all WordPress installations
- Audit existing user accounts and restore any inadvertently deleted accounts from backup
- Review contributor, author, and editor accounts and remove any that are inactive or unnecessary
- Rotate credentials for privileged accounts if unauthorized deletions are detected
Patch Information
The vendor addressed the vulnerability in Eventin 4.1.21 by adding capability verification before the user deletion routine executes. Administrators should install the patched release through the WordPress plugin dashboard or by replacing the plugin files directly. Verify the installed version reports 4.1.21 or higher after the update.
Workarounds
- Deactivate the Eventin plugin until the patched version is deployed if immediate patching is not feasible
- Restrict user registration and prevent assignment of contributor or higher roles to untrusted accounts
- Deploy a web application firewall rule blocking Eventin user deletion endpoints for non-administrator sessions
# Verify installed Eventin plugin version using WP-CLI
wp plugin get wp-event-solution --field=version
# Update Eventin to the patched release
wp plugin update wp-event-solution --version=4.1.21
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
