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

CVE-2026-10865Published · Updated

Action summary

Affected: ≤4.0.11Update to 4.0.12 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:N Integrity
None
A:N Availability
None
Weakness
CWE-200 Information Exposure
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Cost Calculator Builder cost-calculator-builder

  1. Affected≤ 4.0.11
  2. Patched in4.0.12

Update to 4.0.12 or newer.

You are affected if you run ≤ 4.0.11. Version 4.0.12 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Cost Calculator Builder.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 4.0.12, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Cost Calculator Builder to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to oper999.

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Cost Calculator Builder

All 19
More vulnerabilities in Cost Calculator Builder
SeverityVulnerabilityCVEPublished
Medium5.3Unauthenticated Information Exposure
≤4.0.17Update to 4.0.18
CVE-2026-97307
Medium6.5Missing Authorization to Authenticated (Subscriber+) Sensitive Information Disclosure
≤3.6.17Update to 4.0.3
CVE-2026-7753
Medium5.3Unauthenticated Price Manipulation and Insecure Direct Object Reference
≤4.0.1Update to 4.0.2
CVE-2025-14755
Medium5.3Missing Authorization to Unauthenticated Payment Status Bypass
≤3.6.9Update to 3.6.10
CVE-2025-14757
High8.8Unauthenticated Arbitrary File Deletion
≤3.6.3Update to 3.6.4
CVE-2025-12529

Same weakness (Information Exposure)

All Information Exposure
Other Information Exposure vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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