Cost Calculator Builder <= 3.6.9 - Missing Authorization to Unauthenticated Payment Status Bypass
The Cost Calculator Builder plugin for WordPress is vulnerable to Unauthenticated Payment Status Bypass in all versions up to, and including, 3.6.9 only when used in combination with Cost Calculator Builder PRO. This is due to the complete_payment AJAX action being registered via wp_ajax_nopriv, making it accessible to unauthenticated users, and the complete() function only verifying a nonce without checking user capabilities or order ownership. Since nonces are exposed to all visitors via window.ccb_nonces in the page source, any unauthenticated attacker can mark any order's payment status as "completed" without actual payment.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Cost Calculator Builder | <= 3.6.9 | 3.6.10 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-862- Platform
- WordPress
- Package
Cost Calculator Builder- Disclosed
- 15.01.2026
- Updated
- 11.10.2026 10:23
Sources and licenses
Wordfence Intelligence - b8415e5f-17a4-425c-ac28-5dd886d1bcf1 - Wordfence Intelligence
Copyright 1999-2026 The MITRE Corporation
Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Cost Calculator Builder
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 19
- First → latest
- 07.2023 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 3
- Medium 15
Disclosures per year
- 2023: 2
- 2024: 5
- 2025: 7
- 2026: 5
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Cost Calculator Builder <= 3.6.9 - Missing Authorization to Unauthenticated Payment Status Bypass this entry
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