CVE-2025-34104: Missing Auth

Description

An authenticated remote code execution vulnerability exists in Piwik (now Matomo) versions prior to 3.0.3 via the plugin upload mechanism. In vulnerable versions, an authenticated user with Superuser privileges can upload and activate a malicious plugin (ZIP archive), leading to arbitrary PHP code execution on the underlying system. Starting with version 3.0.3, plugin upload functionality is disabled by default unless explicitly enabled in the configuration file.

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Weakness Type (CWE)

CWE-306 Missing Authentication

CWE-434 Unrestricted Upload

References

Other References

https://firefart.at/post/turning_piwik_superuser_creds_into_rce/ https://matomo.org/changelog/piwik-3-0-3/ https://matomo.org/faq/plugins/faq_21/ https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/piwik_superuser_plugin_upload.rb https://www.vulncheck.com/advisories/piwik-authenticated-rce-via-custom-plugin-upload

Frequently Asked Questions

What is CVE-2025-34104? +

An authenticated remote code execution vulnerability exists in Piwik (now Matomo) versions prior to 3.0.3 via the plugin upload mechanism. In vulnerable versions, an authenticated user with Superuser privileges can upload and activate a malicious plugin (ZIP archive), leading to arbitrary PHP code execution on the underlying system. Starting with version 3.0.3, plugin upload functionality is disabled by default unless explicitly enabled in the configuration file.

How do I check if I'm vulnerable to CVE-2025-34104? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-34104