Reported vulnerability

Cost Calculator Builder PRO <= 4.0.3 - Unauthenticated Remote Code Execution via 'orderDetails' Parameter

Q: Which versions of Cost Calculator Builder PRO are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.3. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Cost Calculator Builder PRO?

Wordfence reports a fix for this issue in Cost Calculator Builder PRO. It lists these fixed versions: 4.0.4. 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 28 Jul 2026

Updated 29 Jul 2026

CVE-2026-14900

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

critical · CVSS 9.8

The Cost Calculator Builder PRO plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.0.3 via the js_to_php function. This is due to insufficient sanitization of the orderDetails[*].originalValue field, which is injected verbatim into a calculator formula string passed to PHP eval() inside js_to_php(), with the regex allow-list in evaluateFormula() only filtering alphanumeric tokens and leaving non-word punctuation characters intact. This makes it possible for unauthenticated attackers to execute code on the server. The only authentication barrier is a nonce check, but the required nonce is publicly emitted on every front-end page via the wp_head hook, making it freely obtainable by unauthenticated visitors. Payloads must be non-word XOR gadgets to bypass sanitization.

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

Cost Calculator Builder PRO

Software: plugin · cost-calculator-builder-pro
Affected versions: Start version unspecified, through 4.0.3
Fix availability: Fix available
Fixed versions: 4.0.4

Recommended action

Update to version 4.0.4, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/4c8f2872-06ff-41a2-b601-77a47470de0c?source=api-prod

Data sources and licences

Defiant 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 this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Read licence terms

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

Need help fixing this issue?

Get help checking your site, applying an available update and resolving any problems after updating.

Get help with this issue

Questions about this vulnerability

Which versions of Cost Calculator Builder PRO are affected?

Wordfence lists these affected versions: Start version unspecified, through 4.0.3. Use the version checker above to compare your installed release with this report.

Is a fix available for Cost Calculator Builder PRO?

Wordfence reports a fix for this issue in Cost Calculator Builder PRO. It lists these fixed versions: 4.0.4. 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.

Back to vulnerability database