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CVE-2026-42386 – Unauthenticated SQL Injection – Order Delivery Date for WooCommerce ≤ 4.5.1

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Summary

CVE-2026-42386 is a critical unauthenticated SQL Injection vulnerability (CWE-89) affecting the Order Delivery Date for WooCommerce WordPress plugin by TycheSoftwares, in all versions up to and including 4.5.1. With a CVSS v3.1 score of 9.3 (Critical) and no authentication requirement, any internet-facing WooCommerce store running this plugin is exposed to remote database exfiltration by unauthenticated attackers. A patched version (4.5.2) is available and immediate upgrading is strongly recommended.

Technical details

  • Root cause: Improper neutralization of special elements used in SQL commands (CWE-89); user-supplied input is insufficiently sanitized before being incorporated into database queries, enabling a Blind SQL Injection attack (CAPEC-7).
  • Trigger conditions: The vulnerability is exploitable by any unauthenticated remote attacker by sending a crafted HTTP request to the affected plugin endpoint — no valid account, session, or user interaction is required.
  • Attack vector: Fully network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N), enabling automated mass-exploitation campaigns targeting all exposed installations simultaneously.
  • Impact: The CVSS Scope is Changed (S:C), meaning the vulnerability’s impact extends beyond the plugin itself to the broader WordPress/WooCommerce database. Successful exploitation yields High Confidentiality impact — attackers can extract sensitive database contents including customer orders, personal data, payment records, and WordPress administrator password hashes. Availability impact is rated Low, reflecting the potential for degraded database performance under attack.

Affected software

  • Order Delivery Date for WooCommerce (WordPress plugin by TycheSoftwares) — all versions ≤ 4.5.1

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 Order Delivery Date for WooCommerce plugin to version 4.5.2 or later (patched release confirmed by TycheSoftwares). Version 4.5.3 is also available on WordPress.org.
  • If patching is delayed: Disable the plugin until an update can be applied. Apply web application firewall (WAF) rules to block SQL injection patterns targeting the plugin’s endpoints. Restrict external access to WooCommerce checkout endpoints as a temporary network-layer mitigation.

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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