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CVE-2026-18945 – Unauthenticated Order Data Disclosure and Manipulation – WP Helper Premium < 4.7.6

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Summary

CVE-2026-18945 is an authorization bypass vulnerability (CWE-639) in the WP Helper Premium WordPress plugin, affecting all versions prior to 4.7.6. The plugin fails to validate the order key when rendering its custom order confirmation page or handling related AJAX actions, allowing unauthenticated attackers to view other customers’ order details and modify order statuses. The issue carries a CVSS v3.1 base score of 8.2 (High) and requires WooCommerce to be active with the plugin’s optional order confirmation feature enabled.

Technical details

  • Root cause: The plugin’s order confirmation page and its associated AJAX handlers do not verify that the requesting user actually owns the order — the order key/ID is trusted without validation (CWE-639, Authorization Bypass Through User-Controlled Key).
  • Trigger conditions: WooCommerce must be active on the site, and WP Helper Premium’s optional order confirmation page module must be enabled.
  • Attack vector: Network-based, unauthenticated (AV:N, PR:N, UI:N) — an attacker simply requests the order confirmation page or AJAX endpoint with a manipulated or guessed order reference.
  • Impact: Disclosure of other customers’ order details (personal/order data) and unauthorized modification of order status, with no impact on service availability.

Affected software

  • WP Helper Premium (WordPress plugin, distributed as "wp-helper-lite") — all versions prior to 4.7.6

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Mitigation and recommended actions

  • Immediate: Upgrade WP Helper Premium to version 4.7.6 or later, where order key validation has been fixed.
  • If immediate patching is not possible: Disable the optional order confirmation page module in WP Helper Premium, or restrict access to order confirmation URLs/AJAX endpoints (e.g., via WAF rules or web server access controls) until the update can be applied.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/wp-helper-lite/

References

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