On 12 May 2026 a high-severity vulnerability (CVE-2026-2993) was published for the WordPress plugin “AI Chatbot & Workflow Automation by AIWU” (often packaged as AI Copilot / AIWU). Versions up to and including 1.4.17 are affected by an unauthenticated SQL injection in a function named getListForTbl().

This is a critical issue (CVSS 9.3) that can be triggered without authentication. Any visitor — including automated scanners and bots — may exploit the vulnerable endpoint to inject SQL into the site database. Treat this incident as urgent: read the guidance below and apply mitigations immediately.

Quick summary (for site owners who want the essentials)

• Affected plugin: WordPress AI Chatbot & Workflow Automation by AIWU (AI Copilot / AIWU)
• Vulnerable versions: ≤ 1.4.17
• Vulnerability: Unauthenticated SQL Injection in getListForTbl() (CVE-2026-2993)
• Severidad: Alta (CVSS 9.3)
• Exploitable remotely without authentication
• Immediate actions: update the plugin when a secure release is available. If you cannot update immediately, take temporary mitigations — disable or remove the plugin, restrict access to the vulnerable endpoint, or deploy virtual patching via a WAF or host-level rules.

Por qué esto es tan peligroso

SQL injection (SQLi) allows attackers to inject SQL statements into database queries. When parameters are concatenated directly into SQL without proper binding or sanitisation, attackers can:

• Read or exfiltrate sensitive data (users, emails, hashed passwords, private content)
• Modify or delete data (posts, users, options)
• Create administrative users or escalate privileges
• Execute database-level commands or chain to filesystem or remote code execution in misconfigured environments

Because this vulnerability is unauthenticated, it greatly increases the risk from automated, mass-scanning attackers.

Resumen técnico (alto nivel — sin código de explotación)

The issue appears in getListForTbl(), where SQL queries are constructed using unsanitised request parameters. A typical insecure pattern concatenates user input into an SQL string and executes it with the WordPress database object ($wpdb) without prepared statements or escaping.

Por qué es importante:

• WordPress proporciona $wpdb->prepare() to bind parameters safely. Omitting prepared statements leaves code vulnerable to manipulated SQL logic.
• If the plugin exposes a front-end or AJAX endpoint that forwards parameters to getListForTbl() without validation, attackers can craft requests that inject SQL payloads.

No exploit code or specific payloads will be published here — sharing those increases risk for unpatched sites. Instead, the remainder of this article focuses on detection, safe mitigations and secure coding guidance.

How an attacker might abuse this (scenarios)

• Automated scanning bots and exploit kits will probe many sites and attempt SQL injection payloads against the vulnerable endpoint, enabling mass exploitation.
• Successful exploitation can dump tables such as wp_users, wp_options, or other tables accessible to the WordPress DB user.
• Attackers commonly use SQLi to create admin accounts, alter plugins/themes, or store backdoors in the filesystem via options/features.
• Credential theft from wp_users can lead to site takeover or lateral movement.

Indicadores de compromiso (qué buscar ahora)

Look for the following signs. Individually they are not definitive proof, but together they may indicate exploitation and require immediate investigation:

• Database warnings or SQL errors in application logs.
• High volume of requests to plugin-specific endpoints (AJAX or REST routes) from unusual IPs or ranges.
• Database queries referencing información_esquema or other metadata (if query logging is available).
• Unexpected admin user accounts or changed privileges in wp_users.
• Modified plugin/theme files or unexpected file changes in wp-content directorios.
• Suspicious scheduled tasks (WordPress cron) or new cron entries.
• Unusual outbound network connections from the site, or data exfiltration attempts.
• Spam email activity or unexpected changes to mail settings.
• Sudden increases in CPU or database load.

If you observe these, assume possible compromise and follow the post-incident checklist below.

Immediate steps to mitigate exposure (step-by-step)

If your site runs the AIWU plugin and the version is ≤ 1.4.17, act immediately. Choose the actions that fit your operational constraints:

1. Confirmar la presencia y versión del plugin
   • WP Admin: Plugins → Installed Plugins → check version.
   • FTP/SSH: Inspect wp-content/plugins/ (readme or plugin header).
2. Update to a patched release if available
   • Use the WP admin updater or your deployment tooling. After updating, clear caches and re-scan the site for malware.
3. Si no puede actualizar de inmediato
   • Deactivate the plugin via the admin UI (Plugins → Deactivate).
   • If admin is inaccessible, rename the plugin directory using SFTP/SSH (for example, append .deshabilitado to the folder name) to prevent the code from loading.
4. Parcheo virtual / WAF
   • Deploy host-level or edge WAF rules to block SQLi patterns and access to the plugin’s endpoints. Blocking the vulnerable endpoint or specific parameters is an effective temporary measure.
   • Rate-limit requests to plugin endpoints to slow automated scanners.
5. Restrict access where possible
   • If the endpoint is admin-only, restrict access to /wp-admin and plugin pages by IP where feasible.
   • Consider HTTP authentication on administrative areas and disable public AJAX calls for the plugin if configurable.
6. Rota credenciales y secretos
   • Rotate database credentials if you suspect compromise.
   • Rotate WordPress admin passwords, API keys and any other secrets stored in the database.
7. Backups before further changes
   • Take a full file and database backup (store offsite) for forensic analysis before performing extensive remediation.
8. Monitorear registros y tráfico
   • Enable and review detailed HTTP and database logging. Watch for repeat attempts after mitigations are applied.

WAF / virtual patching guidance (patterns, not exploit payloads)

A well-configured WAF can stop many SQL injection attempts before they reach the application. Below are general patterns you can use to create or tune rules. These are mitigation measures until an official plugin update is available; they are not a substitute for code fixes.

Suggested rule logic (conceptual):

• Block requests containing SQL keywords combined with meta-characters: UNIÓN SELECCIONAR, INFORMATION_SCHEMA, CARGAR_ARCHIVO(, EN_ARCHIVO_SALIDA, DORMIR(, comment markers like -- or /*.
• Block tautology patterns: ' or '1'='1, O 1=1, etc.
• Block or restrict access to plugin-specific routes (for example: /wp-admin/admin-ajax.php?action=aiwu_get_list or plugin REST endpoints) except from trusted IPs.
• Apply per-IP rate limits to slow automated scanners.

Test WAF rules in monitoring/logging mode first to avoid disruptive false positives.

Ejemplo de regla estilo ModSecurity (conceptual)

# Block obvious SQLi terms in URI, query parameters or body
SecRule REQUEST_URI|ARGS|REQUEST_BODY "@rx (?i)(union\s+select|information_schema|load_file\s*\(|into\s+outfile|sleep\s*\(|benchmark\(|or\s+1=1|--\s|/\*|\bconcat\()"
    "id:1001001,phase:2,deny,status:403,msg:'SQLi protection - potential exploit',log"

Do not drop this into production without testing and tuning. Use it as an educational example for building rules appropriate to your environment.

Secure code practices — how the plugin should be fixed

If you are a developer responsible for plugin code, follow these practices to avoid SQL injection in WordPress:

Patrón vulnerable (no usar):

// DO NOT do this:
$sql = "SELECT * FROM {$wpdb->prefix}my_table WHERE column = '" . $_GET['param'] . "'";
$rows = $wpdb->get_results($sql);

Safe pattern using $wpdb->prepare():

$param = isset($_GET['param']) ? $_GET['param'] : '';
$sql = $wpdb->prepare( "SELECT * FROM {$wpdb->prefix}my_table WHERE column = %s", $param );
$rows = $wpdb->get_results( $sql );

Orientación:

• Uso %d for integers and %s for strings in $wpdb->preparar.
• For LIKE queries use esc_like() más preparar.
• Validate and sanitize inputs early — prefer whitelisting values and type checks.
• Use WordPress APIs when possible rather than raw SQL.
• Protect admin AJAX and REST endpoints with capability checks and nonces.
• Do not expose raw database errors to end users.

Post-exploitation cleanup checklist (if you suspect compromise)

If you suspect the site has been compromised, follow a careful, evidence-preserving process. If unsure, engage a professional with forensic experience.

1. Take the site offline or block public traffic to preserve evidence.
2. Back up current files and the database and store the copies offsite.
3. Scan for malware, webshells, and modified files using multiple tools if possible.
4. Inspeccionar wp_users for unexpected admin accounts and investigate any anomalies.
5. Examinar wp_options and other tables for suspicious serialized payloads or rogue entries.
6. Remove the vulnerable plugin (deactivate and delete) until patched code is available.
7. Rotate all credentials: WordPress admin, DB user, SFTP/FTP, hosting control panel, API keys.
8. Restore from known-good backups where feasible and verify integrity before returning to production.
9. Harden the site: least privilege, disable file editing, enable file integrity monitoring.
10. Re-scan after cleanup and monitor logs for re-infection or persistence.

Recomendaciones de endurecimiento a largo plazo

• Keep plugins and themes updated; test updates in staging before production.
• Minimice el número de complementos activos y elimine los no utilizados.
• Require plugins from reputable sources and review changelogs and support history.
• Use edge or host-level WAFs and continuous scanning services that offer virtual patching when practical.
• Implement automated backups and regularly test restores.
• Use strong authentication: unique admin accounts, strong passwords, and two-factor authentication.
• Restrict database user privileges to only what WordPress requires.
• Monitor logs and set alerts for anomalous activity.
• Maintain an incident response plan and contacts for trusted security assistance.

Signature and detection examples (for site admins and hosts)

If you operate host-level logging or an IDS, add detection for these high-level patterns:

• Parameters containing SQL keywords like UNIÓN, INFORMATION_SCHEMA, DORMIR(, CARGAR_ARCHIVO(.
• High rates of 400/403 responses targeting plugin endpoints from the same IP.
• Solicitudes a admin-ajax.php or REST endpoints with payloads including SQL keywords.
• Any request patterns that correlate with repeated DB errors in logs.

Tune detection thresholds to reduce false positives while maintaining sensitivity to likely exploit attempts.

What to communicate to your stakeholders

• Notify affected site owners immediately if you manage multiple sites.
• Inform internal teams (IT, DevOps, support) of the vulnerability and planned mitigations.
• If an incident occurred, document detection, containment, remediation and lessons learned.
• Coordinate scheduled maintenance or downtime with users as needed.

Final notes — urgency and prudence

CVE-2026-2993 is an unauthenticated SQL injection affecting common code paths in the AIWU plugin. Public disclosure will draw scanning and exploitation attempts quickly. If your WordPress sites use this plugin, treat this as a high-priority incident: patch if a fixed version exists, or isolate/disable the plugin and apply temporary protections.

If you need assistance with testing, mitigation, or incident response and do not have in-house expertise, contact a trusted security professional. Rapid containment reduces risk and potential data loss.