CVE-2024-3821 Overview
CVE-2024-3821 affects the premium version of the wpDataTables WordPress plugin. The plugin fails to perform capability checks on several functions in the wdt_ajax_actions.php file. All versions up to and including 6.3.2 are vulnerable. Unauthenticated attackers can manipulate data tables through exposed AJAX endpoints.
The vulnerability is classified under [CWE-862] Missing Authorization. The flaw stems from inadequate access control on AJAX action handlers exposed to network requests. Successful exploitation allows attackers to modify table data without authentication.
Critical Impact
Unauthenticated attackers can manipulate WordPress data tables managed by the wpDataTables premium plugin, affecting data integrity on impacted sites.
Affected Products
- wpDataTables Premium plugin for WordPress, versions up to and including 6.3.2
- WordPress sites running the premium wpDataTables – WordPress Data Table, Dynamic Tables & Table Charts Plugin
- The free version of wpDataTables is not affected
Discovery Timeline
- 2024-06-01 - CVE-2024-3821 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-3821
Vulnerability Analysis
The wpDataTables premium plugin registers multiple AJAX actions in wdt_ajax_actions.php. These handlers process requests to create, read, update, and modify table data. The plugin omits current_user_can() capability checks on several of these functions.
WordPress AJAX endpoints reachable via admin-ajax.php accept requests from any source when registered with the wp_ajax_nopriv_ prefix or when authorization logic is missing. Without capability verification, the plugin treats unauthenticated callers as authorized operators. Attackers can issue HTTP POST requests directly to the AJAX endpoint to invoke the affected functions.
The attack reaches the application over the network with low complexity and requires no privileges or user interaction. Exploitation produces limited impact across confidentiality, integrity, and availability of the affected tables.
Root Cause
The root cause is missing authorization on AJAX action callbacks within wdt_ajax_actions.php. WordPress requires developers to invoke capability checks such as current_user_can() and nonce verification using check_ajax_referer() inside each privileged callback. The vulnerable functions skip these checks, exposing privileged operations to anonymous users.
Attack Vector
An attacker sends crafted POST requests to wp-admin/admin-ajax.php on the target WordPress site. The request specifies one of the vulnerable wpDataTables action names along with parameters describing the table modification. The plugin processes the request and applies the changes without verifying the caller's identity or capabilities. Refer to the Wordfence Vulnerability Analysis for additional technical context.
Detection Methods for CVE-2024-3821
Indicators of Compromise
- Unexpected POST requests to /wp-admin/admin-ajax.php containing wpDataTables action parameters from unauthenticated sessions
- Unauthorized modifications to wpDataTables records, table schemas, or chart configurations in the WordPress database
- Web server access logs showing repeated AJAX action calls without a valid authenticated session cookie
Detection Strategies
- Review the installed wpDataTables version against 6.3.2 or earlier and confirm whether the premium edition is active
- Inspect WordPress audit logs for table modifications that do not correlate with administrator activity
- Monitor HTTP traffic for requests targeting admin-ajax.php with action parameters tied to wpDataTables handlers
Monitoring Recommendations
- Forward WordPress and web server logs to a centralized analytics platform for query and correlation
- Alert on bursts of admin-ajax.php POST requests originating from a single IP without prior authentication
- Track database changes to wpDataTables tables and compare against expected administrator operations
How to Mitigate CVE-2024-3821
Immediate Actions Required
- Update the wpDataTables premium plugin to a version newer than 6.3.2 that addresses the missing authorization checks
- Audit the WordPress database for unexpected changes to tables managed by the plugin and restore from backup if tampering is found
- Restrict access to admin-ajax.php from untrusted networks where possible using a web application firewall
Patch Information
The vendor has released updates documented in the wpDataTables Changelog. Administrators should apply the latest premium plugin release. Verify the installed version through the WordPress plugins dashboard after updating.
Workarounds
- Disable the wpDataTables premium plugin until patching is possible if the affected functionality is non-essential
- Deploy WAF rules that block unauthenticated requests to wpDataTables AJAX actions on admin-ajax.php
- Limit administrative interface access to known IP ranges through web server or reverse proxy configuration
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
