# CVE-2026-10865: Cost Calculator Builder <= 4.0.11 - Unauthenticated Sensitive Information Exposure of Payment Gateway Secret Keys

> Unauthenticated attackers can extract payment gateway secret keys from page source if specific global settings are enabled, leading to potential account takeover.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jul 2026
- **Updated:** 13 Jul 2026
- **Also known as:** GHSA-7cvm-m8m6-prmw

## What is CVE-2026-10865?

CVE-2026-10865 is a medium-severity vulnerability in stylemix Cost Calculator Builder, published on 11 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 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.

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

## Which versions are affected by CVE-2026-10865?


## How do I fix CVE-2026-10865?

No fix has been published for CVE-2026-10865 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-10865 being exploited?

There is no known exploitation of CVE-2026-10865 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-10865 and fix it if it is affected.

What it is: CVE-2026-10865 is a medium-severity vulnerability in stylemix Cost Calculator Builder, published on 11 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-2026-10865 in the wild and no public exploit code.

Affected product: stylemix Cost Calculator Builder. 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-2026-10865/ (Markdown: https://insights.sbomify.com/CVE-2026-10865/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10865
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10865
- OSV: https://osv.dev/vulnerability/CVE-2026-10865

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10865/
Summaries are generated and may contain mistakes; the official description above is the record.