CorvusPay WooCommerce Payment Gateway <= 2.7.4 - Unauthenticated Improper Verification of Cryptographic Signature to Payment Bypass via /wp-json/corvuspay/success/ REST Endpoint

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Summary

CVECVE-2026-9027
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-09 11:16:42 UTC
Updated2026-07-09 16:19:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.002220000 probability, percentile 0.126980000 (date 2026-07-10)

Problem Types: CWE-347 | CWE-347 CWE-347 Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Corvusinfo CorvusPay WooCommerce Payment Gateway affected 2.7.4 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.4/includes... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.4/includes... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.4/includes... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/3bc9f344-b605-4257-8d77-e073f... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/corvuspay-woocommerce-integration/tags/2.7.2/includes... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Valatty (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-08T20:40:59.000ZDisclosed
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