# CVE-2025-12539: Information disclosure in TNC Toolbox: Web Performance

> Unauthenticated attackers can retrieve exposed cPanel credentials from web-accessible files, leading to account takeover and remote code execution.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:** 11 Nov 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-92c8-jh9m-53gp

## What is CVE-2025-12539?

CVE-2025-12539 is a critical vulnerability in leopardhost TNC Toolbox: Web Performance, published on 11 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The TNC Toolbox: Web Performance plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.4.2. This is due to the plugin storing cPanel API credentials (hostname, username, and API key) in files within the web-accessible wp-content directory without adequate protection in the "Tnc_Wp_Toolbox_Settings::save_settings" function. This makes it possible for unauthenticated attackers to retrieve these credentials and use them to interact with the cPanel API, which can lead to arbitrary file uploads, remote code execution, and full compromise of the hosting environment.

Weakness: CWE-922 (Insecure Storage of Sensitive Information)

## Which versions are affected by CVE-2025-12539?


## How do I fix CVE-2025-12539?

No fix has been published for CVE-2025-12539 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12539 being exploited?

There is no known exploitation of CVE-2025-12539 in the wild and no public exploit code.

Public exploit code:

- TNC Toolbox: Web Performance <= 1.4.2 - Unauthenticated Sensitive Information Exposure to Privilege Escalation/cPanel Account Takeover (github_poc): https://github.com/Nxploited/CVE-2025-12539

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12539 and fix it if it is affected.

What it is: CVE-2025-12539 is a critical vulnerability in leopardhost TNC Toolbox: Web Performance, published on 11 Nov 2025. 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-2025-12539 in the wild and no public exploit code.

Affected product: leopardhost TNC Toolbox: Web Performance. 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-2025-12539/ (Markdown: https://insights.sbomify.com/CVE-2025-12539/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12539
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12539
- OSV: https://osv.dev/vulnerability/CVE-2025-12539

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12539/
Summaries are generated and may contain mistakes; the official description above is the record.