CVE-2026-82223 Overview
CVE-2026-82223 is a broken access control vulnerability [CWE-862] in the WP Event Solution WordPress plugin. The flaw affects versions 4.1.22 and earlier. Unauthenticated attackers can reach protected functionality over the network because the plugin fails to enforce authorization checks on sensitive operations.
Successful exploitation lets remote attackers manipulate plugin data or trigger restricted actions without any credentials or user interaction. The vulnerability was disclosed through Patchstack's WordPress vulnerability database.
Critical Impact
Remote, unauthenticated attackers can bypass access controls in WP Event Solution ≤ 4.1.22 to affect integrity and availability of event data on affected WordPress sites.
Affected Products
- WP Event Solution WordPress plugin versions ≤ 4.1.22
- WordPress sites with the affected plugin installed and activated
- Any hosting environment exposing the plugin's endpoints to the network
Discovery Timeline
- 2026-09-02 - CVE-2026-82223 published to NVD
- 2026-09-02 - Last updated in NVD database
Technical Details for CVE-2026-82223
Vulnerability Analysis
The vulnerability sits in WP Event Solution's request handling layer. The plugin exposes actions that should be restricted to authenticated or privileged users. However, the code path does not verify the caller's identity or capability before executing the requested operation.
An attacker can send a crafted HTTP request directly to the vulnerable endpoint. The plugin processes the request and performs the action as if it originated from an authorized session. This pattern is classified as Missing Authorization [CWE-862].
The reachable functionality permits limited modification of plugin-managed data and can affect availability of event-related features. Confidentiality impact is not indicated in the advisory. Because the attack requires no authentication and no user interaction, mass scanning and opportunistic exploitation are practical against exposed WordPress sites.
Root Cause
The root cause is missing authorization enforcement on plugin request handlers. The affected code paths do not call WordPress capability checks such as current_user_can() and do not validate nonces before performing state-changing operations. Any client that can reach the endpoint can invoke it.
Attack Vector
Exploitation occurs over the network against the WordPress site's HTTP interface. An attacker issues requests to the WP Event Solution plugin endpoints, for example through admin-ajax.php or plugin-registered REST routes. No credentials, session, or user interaction are required. See the Patchstack advisory for the vulnerable endpoint context.
Detection Methods for CVE-2026-82223
Indicators of Compromise
- Unauthenticated POST or GET requests to WP Event Solution AJAX or REST endpoints in wp-content/plugins/wp-event-solution/ paths.
- Unexpected modifications to event, attendee, or configuration records managed by the plugin.
- Requests to admin-ajax.php referencing WP Event Solution actions from IPs without prior authenticated sessions.
Detection Strategies
- Review WordPress access logs for requests to plugin-registered REST routes without a valid authenticated Cookie header.
- Enable plugin audit logging (via a security plugin) to record write operations against event data and correlate them with the requesting user ID.
- Alert on high request volumes to WP Event Solution endpoints originating from a single source, which is consistent with automated scanning.
Monitoring Recommendations
- Forward WordPress and web server logs to a centralized logging or SIEM platform and build queries for the plugin's endpoint paths.
- Monitor database change rates on plugin-owned tables to catch bulk manipulation of event records.
- Track new or modified administrator or event-manager accounts created outside of expected change windows.
How to Mitigate CVE-2026-82223
Immediate Actions Required
- Update WP Event Solution to a version later than 4.1.22 as soon as the vendor publishes a fixed release.
- If a patch is not yet available, deactivate the WP Event Solution plugin until it can be updated.
- Audit event, attendee, and plugin configuration records for unauthorized changes made prior to remediation.
Patch Information
Refer to the Patchstack WordPress Vulnerability Report for fix status and the recommended upgrade path. Apply the vendor's patched release once available and verify the plugin version through the WordPress admin dashboard.
Workarounds
- Restrict access to WordPress admin AJAX and REST endpoints at the web application firewall (WAF) layer, allowing only authenticated sessions where feasible.
- Add virtual patching rules that block anonymous requests to WP Event Solution actions until the plugin is updated.
- Limit plugin exposure by placing the WordPress admin interface behind IP allowlists or VPN access.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
