CVE-2026-9027CorvusPay WooCommerce Payment Gateway <= 2.7.4 - Unauthenticated Improper Verification of Cryptographic Signature to Payment Bypass via /wp-json/corvuspay/success/ REST Endpoint
- 5.3MediumCVSS base score
- 0.37%Exploitation in 30 daysEPSS · top 69% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The CorvusPay WooCommerce Payment Gateway plugin for WordPress is vulnerable to Payment Bypass via Improper Verification of Cryptographic Signature in all versions up to, and including, 2.7.4. The `corvuspay_success_handler` function registers the REST endpoint `POST /wp-json/corvuspay/success/` with `'permission_callback' => '__return_true'`, and while it calls `$this->client->validate->signature()` and stores the boolean result in `$res`, the result is never evaluated in a conditional — it is only written to the debug log — causing execution to unconditionally reach `$order->payment_complete()` regardless of whether the cryptographic signature is valid. This makes it possible for unauthenticated attackers to mark any pending WooCommerce order as fully paid by sending a POST request to the success endpoint containing an arbitrary or forged signature value, allowing them to obtain goods or services without payment. Because WooCommerce order IDs are sequential integers, target orders are trivially enumerable via the `order_number` POST parameter, requiring no prior knowledge of the victim order.
Timeline
ID reserved
By Wordfence
- 51 days later
· 51 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
corvusinfo · CorvusPay WooCommerce Payment Gateway
- affected ≤ 2.7.4
References
References8
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3bc9f344-b605-4257-8d77-e073f85fe344?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.4/includes/class-wc-gateway-corvuspay.php#L656 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.4/includes/class-wc-order-corvuspay.php#L188 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.4/includes/class-wc-gateway-corvuspay.php#L202 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes/class-wc-gateway-corvuspay.php#L656 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes/class-wc-order-corvuspay.php#L188 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes/class-wc-gateway-corvuspay.php#L202 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3576949%40corvuspay-woocommerce-integration&new=3576949%40corvuspay-woocommerce-integration (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-42560 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-9027)Record last updated .