Reported vulnerability

Cost Calculator Builder <= 4.0.11 - Unauthenticated Sensitive Information Exposure of Payment Gateway Secret Keys

Q: Which versions of Cost Calculator Builder are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.11. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Cost Calculator Builder?

Wordfence reports a fix for this issue in Cost Calculator Builder. It lists these fixed versions: 4.0.12. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 10 Jul 2026

Updated 11 Jul 2026

CVE-2026-10865

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 5.3

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.

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

Cost Calculator Builder

Software: plugin · cost-calculator-builder
Affected versions: Start version unspecified, through 4.0.11
Fix availability: Fix available
Fixed versions: 4.0.12

Recommended action

Update to version 4.0.12, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/29de766d-5e7e-46b4-acac-feec5b33589e?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of Cost Calculator Builder are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.11. Use the version checker above to compare your installed release with this report.

Is a fix available for Cost Calculator Builder?

Wordfence reports a fix for this issue in Cost Calculator Builder. It lists these fixed versions: 4.0.12. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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