# CVE-2026-14900: Cost Calculator Builder PRO <= 4.0.3 - Unauthenticated Remote Code Execution via 'orderDetails' Parameter

> Unauthenticated attackers can execute arbitrary code on WordPress sites using Cost Calculator Builder PRO by injecting PHP into the orderDetails parameter.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jul 2026
- **Updated:** 29 Jul 2026
- **Also known as:** GHSA-pm79-7c72-f572

## What is CVE-2026-14900?

CVE-2026-14900 is a critical code injection vulnerability in StylemixThemes Cost Calculator Builder PRO, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-14900?


## How do I fix CVE-2026-14900?

No fix has been published for CVE-2026-14900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-14900 being exploited?

There is no known exploitation of CVE-2026-14900 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-14900 and fix it if it is affected.

What it is: CVE-2026-14900 is a critical code injection vulnerability in StylemixThemes Cost Calculator Builder PRO, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-14900 in the wild and no public exploit code.

Affected product: StylemixThemes Cost Calculator Builder PRO. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-14900/ (Markdown: https://insights.sbomify.com/CVE-2026-14900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-14900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-14900
- OSV: https://osv.dev/vulnerability/CVE-2026-14900

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-14900/
Summaries are generated and may contain mistakes; the official description above is the record.