CVE-2026-10865
Cost Calculator Builder <= 4.0.11 - Unauthenticated Sensitive Information Exposure of Payment Gateway Secret Keys
CVSS Score
5.3
EPSS Score
0.4%
EPSS Percentile
29th
The Cost Calculator Builder plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 4.0.11 via the (template body). This makes it possible for unauthenticated attackers to extract the plaintext Stripe secret key, Razorpay secret key, and PayPal client_secret embedded in the page source of any page containing a calculator, enabling full control of the merchant's payment gateway accounts. This exposure only occurs when the 'use in all calculators' option is enabled for one or more payment gateways in the plugin's global settings.
| CWE | CWE-200 |
| Vendor | stylemix |
| Product | cost calculator builder |
| Published | Jul 11, 2026 |
| Last Updated | Jul 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
stylemix / Cost Calculator Builder
0 ≤ 4.0.11
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/29de766d-5e7e-46b4-acac-feec5b33589e?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/4.0.5/templates/frontend/render.php#L281 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/4.0.5/templates/frontend/render.php#L61 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/4.0.5/templates/frontend/render.php#L28 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/4.0.5/includes/functions.php#L748 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/3.6.17/templates/frontend/render.php#L281 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/3.6.17/templates/frontend/render.php#L61 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/3.6.17/templates/frontend/render.php#L28 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/cost-calculator-builder/tags/3.6.17/includes/functions.php#L748 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset?reponame=&old=3578557%40cost-calculator-builder&new=3578557%40cost-calculator-builder
Credits
oper999