CVE-2026-3640 json
STRABL <= 4.5 - Unauthenticated Arbitrary Webhook Creation via REST API Endpoint
published 2026-06-19 4 mo ago modified 2026-06-22 4 mo ago also EUVD-2026-37995
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
The STRABL – A checkout solution plugin for WordPress is vulnerable to Missing Authentication in all versions up to and including 4.5. The plugin registers a REST API webhook endpoint at /wp-json/strabl/webhook/order with a permission_callback of __return_true, which allows all incoming requests without any authentication or authorization checks. No shared secret, signature validation, HMAC verification, or token-based authentication is implemented. This makes it possible for unauthenticated attackers to create fraudulent WooCommerce orders and mark them as completed by supplying paymentStatus=paid, manipulate existing order statuses by providing an externalOrderId, create new WordPress user accounts with the customer role, issue refunds on existing orders, cancel existing orders, and apply chargeback fees — all without making a legitimate payment or having any valid credentials.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- strablengineering STRABL – A checkout solution
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/04eb82e4-1738-44c7-980e-8e33a7a3a23a?source=cve
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L60
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L60
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L64
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L64
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L88
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L88
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L550
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L550
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L199
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L199
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/trunk/src/Orders/CustomerRepository.php#L17
- plugins.trac.wordpress.org /browser/strabl-a-checkout-solution/tags/4.5/src/Orders/CustomerRepository.php#L17
- plugins.trac.wordpress.org /changeset/3558301
Sources
- CVE List CVE-2026-3640
- NVD CVE-2026-3640
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.