CVE-2026-14900Network attack vector

Unauthenticated code execution via eval formula injection

Published Jul 29, 2026 · Updated Jul 29, 2026

Code injection in js_to_php in StylemixThemes Cost Calculator Builder Pro 4.0.3 and earlier allows remote attackers to execute PHP code. The function inserts orderDetails[*].originalValue verbatim into a calculator formula passed to PHP eval(), while evaluateFormula() leaves non-word punctuation intact. The nonce check does not authenticate access because wp_head publishes the nonce on every front-end page; exploitation requires a non-word XOR gadget.

CVSS severity9.8
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in js_to_php in StylemixThemes Cost Calculator Builder Pro 4.0.3 and earlier allows remote attackers to execute PHP code. The function inserts orderDetails[*].originalValue verbatim into a calculator formula passed to PHP eval(), while evaluateFormula() leaves non-word punctuation intact. The nonce check does not authenticate access because wp_head publishes the nonce on every front-end page; exploitation requires a non-word XOR gadget.

The record

CVE
CVE-2026-14900
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
StylemixThemes
Product
Cost Calculator Builder Pro
Classifications
CWE-94, T1059, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

StylemixThemes · Cost Calculator Builder Proversion=0 <=4.0.3

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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