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CVE-2026-39492 – Unauthenticated SQL Injection – WP Maps WordPress Plugin ≤ 4.9.1

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Summary

CVE-2026-39492 is a critical unauthenticated SQL injection vulnerability in the WP Maps WordPress plugin (developed by Flipper Code, also distributed as wp-google-map-plugin), affecting all versions up to and including 4.9.1. With a CVSS v3.1 score of 9.3 (Critical), the flaw allows any unauthenticated remote attacker to inject malicious SQL statements via the location_id parameter and extract sensitive contents from the underlying WordPress database — including user credentials and personally identifiable information — with no authentication or user interaction required.

Technical details

  • Root cause: The plugin’s database abstraction layer (FlipperCode_Model_Base::is_column()) incorrectly treats user-supplied input wrapped in backtick characters as trusted SQL column identifiers. This logic flaw causes the function to bypass the plugin’s use of WordPress’s esc_sql() escaping mechanism, leaving the input unsanitized before it is incorporated into database queries.
  • Trigger conditions: An attacker sends a crafted HTTP request to WordPress’s admin-ajax.php endpoint with the action parameter set to wpgmp_ajax_call. This handler is registered for unauthenticated users via WordPress’s wp_ajax_nopriv hook, making it reachable without any login session.
  • Attack vector: Fully remote and unauthenticated. No privileges and no user interaction are required. Exploitation requires only network access to the target WordPress site.
  • Impact: Time-based blind SQL injection, enabling complete exfiltration of the WordPress database. The CVSS Scope metric is rated Changed (S:C), indicating that successful exploitation can impact resources beyond the vulnerable component itself. Confidentiality impact is rated High (C:H).

Affected software

  • WP Maps (plugin slug: wp-google-map-plugin) by Flipper Code — all versions ≤ 4.9.1

Severity

  • CVSS v3.1 Base Score: 9.3 (Critical)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Mitigation and recommended actions

  • Immediate: Update the WP Maps plugin to version 4.9.2 or later via the WordPress plugin dashboard. Version 4.9.2 contains the vendor-provided fix for this vulnerability.
  • If immediate patching is not feasible:
    • Implement a WAF rule to block unauthenticated requests to admin-ajax.php containing action=wpgmp_ajax_call.
    • Temporarily deactivate the WP Maps plugin until patching can be performed.
    • Restrict external HTTP access to the wp-admin/admin-ajax.php endpoint where operationally possible.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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