CVE-2026-3640STRABL <= 4.5 - Unauthenticated Arbitrary Webhook Creation via REST API Endpoint
- 5.3MediumCVSS base score
- 0.64%Exploitation in 30 daysEPSS · top 49% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Wordfence
- 4 months later
· 4 months later
Published
- 3 days later
· 3 days later
Record updated
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)
- 0.64% · top 49% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · 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
strablengineering · STRABL – A checkout solution
- affected ≤ 4.5
References
References14
- https://www.wordfence.com/threat-intel/vulnerabilities/id/04eb82e4-1738-44c7-980e-8e33a7a3a23a?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L60 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L60 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L64 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L64 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L88 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L88 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L550 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L550 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/trunk/src/Orders/OrderWebhookController.php#L199 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/tags/4.5/src/Orders/OrderWebhookController.php#L199 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/trunk/src/Orders/CustomerRepository.php#L17 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/strabl-a-checkout-solution/tags/4.5/src/Orders/CustomerRepository.php#L17 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3558301 (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-2026-37995 (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-2026-3640)Record last updated .