CVE-2026-10865

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

2026-07-10 17:35
oper999

Strategic Overview

Status
Patched in 4.0.12
Affected Plugin
Cost Calculator Builder
Affected Version
<= 4.0.11
CVSS
5.3Medium
Weakness type
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
CVE
CVE-2026-10865
View all Cost Calculator Builder vulnerabilities

At a glance

CVE-2026-10865 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor vulnerability in the Cost Calculator Builder WordPress plugin, affecting versions <= 4.0.11. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.0.12; sites on affected versions should update now. Disclosed July 2026, reported by oper999.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Reaching this weakness in Cost Calculator Builder <= 4.0.11 takes no account at all. Sensitive information exposure means data the application intended to keep internal is returned to a caller who should not be able to see it.

The disclosed data — credentials, tokens, customer records or internal paths — is usually worth more as material for a follow-up attack than as an end in itself. For Cost Calculator Builder the fix is 4.0.12: builds <= 4.0.11 are affected, anything from 4.0.12 onward is not.

Remediation

Update to version 4.0.12, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Cost Calculator Builder 4.0.12 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-10865https://www.wordfence.com/threat-intel/vulnerabilities/id/29de766d-5e7e-46b4-acac-feec5b33589ehttps://nvd.nist.gov/vuln/detail/CVE-2026-10865

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C