CVE-2026-18391WooCommerce Subscriptions < 9.1.0 - Unauthenticated RCE via PHP Object Injection
Updated under an hour ago ()
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It affects Unknown WooCommerce Subscriptions. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94, CWE-434
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- WPScan
- NVD analysis
- Deferred
- Record last updated
- Aug 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Unknown WooCommerce Subscriptions unknown:woocommerce_subscriptions (from the name) | from 4.7.0 before 9.1.0 | CNA record |
References
- https://wpscan.com/vulnerability/191f76cf-e5bd-4a37-ac1c-9187cea2aa27/exploit, vdb-entry, technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.