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CVE-2026-18391

CRITICAL 9.8 CVSS 3.1
Published
August 12, 2026
Last modified
August 26, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-434
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The WooCommerce Subscriptions WordPress plugin before 9.1.0 does not validate user input before unserializing it on stores with High-Performance Order Storage enabled, leading to a PHP Object Injection issue which unauthenticated users can escalate to Remote Code Execution via a gadget chain present in the bundled dependencies.

Affected products and versions

  • Unknown WooCommerce Subscriptions — From 4.7.0 (including) to 9.1.0 (excluding)

References

  • wpscan.com https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/
  • nvd.nist.gov Official NVD record