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CVE-2026-61950 – Unauthenticated SQL Injection – TrueBooker WordPress Plugin <= 1.2.3

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Summary

CVE-2026-61950 is a critical unauthenticated SQL injection vulnerability (CWE-89) in the TrueBooker – Appointment Booking and Scheduler System WordPress plugin, developed by themetechmount, affecting all versions up to and including 1.2.3. With a CVSS v3.1 base score of 9.3 (Critical), the flaw requires no authentication and no user interaction to exploit over the network, and carries a changed scope with high confidentiality impact. The IONIX research team recommends immediate upgrade to version 1.2.4 or later.

Technical details

  • Root cause: Improper neutralization of special elements used in SQL commands (CWE-89), allowing attacker-controlled input to be embedded directly into database queries without adequate sanitization or parameterization.
  • Trigger conditions: No authentication, no privilege level, and no user interaction are required — any remote, unauthenticated attacker can send a crafted HTTP request to the vulnerable plugin endpoint.
  • Attack vector: Network (AV:N) with low attack complexity (AC:L), making the vulnerability trivially exploitable against any internet-facing WordPress site running the affected plugin.
  • Impact: High confidentiality impact (C:H) — successful exploitation enables extraction of sensitive data from the WordPress database, including credentials, user records, and booking data. Low availability impact (A:L) is also indicated. The changed scope (S:C) means that exploitation can affect resources beyond the vulnerable plugin component itself.

Affected software

  • TrueBooker – Appointment Booking and Scheduler System (WordPress plugin by themetechmount), all versions up to and including 1.2.3

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 action: Update the TrueBooker plugin to version 1.2.4 or later. The 1.2.4 release includes targeted security fixes: multiple security vulnerabilities patched and improved authorization checks. The current available version is 1.2.6, which includes further security and bug fix updates. Updates can be applied directly from the WordPress admin panel under Plugins → Installed Plugins.
  • If immediate patching is not possible: Restrict external HTTP access to WordPress AJAX and REST API endpoints at the network or WAF level to limit unauthenticated request reach until the plugin can be updated.
  • Verify exposure: Confirm whether the TrueBooker plugin is active on any internet-facing WordPress instances in your environment and prioritize those for patching.

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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