CriticalPublic exploit

Authenticated RCE via Plugin Upload in Piwik/Matomo

IdentifiersCVE-2025-34104CWE-434· Unrestricted Upload of File with…

CVE-2025-34104 is an authenticated remote code execution vulnerability affecting Piwik (now Matomo) versions prior to 3.0.3. The issue resides in the plugin upload mechanism: a user with Superuser privileges can upload a crafted malicious plugin packaged as a ZIP archive and then activate it, causing attacker-controlled PHP code contained in the plugin to execute on the server. The vulnerability stems from unsafe acceptance and execution of uploaded plugin content, effectively allowing executable server-side code to be introduced through the application’s extension management functionality. Beginning with version 3.0.3, plugin upload is disabled by default unless explicitly enabled in configuration.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation results in arbitrary PHP code execution in the context of the web application on the underlying host. An attacker with the required authenticated Superuser access can execute commands or deploy additional payloads, potentially leading to full compromise of the Matomo/Piwik instance, access to application data, modification of analytics configuration, persistence through malicious plugins, and possible further compromise of the server depending on the privileges of the web server/PHP runtime account.

Mitigation

If you can’t patch tonight, do this now.

Disable plugin upload functionality if it is enabled, and restrict Superuser access to only fully trusted administrators. Monitor for plugin installation and activation events, especially unexpected ZIP uploads or newly enabled plugins. Limit outbound and filesystem permissions of the web server/PHP process where possible to reduce post-exploitation impact. If upgrade cannot be performed immediately, enforce strong administrative authentication controls and review the instance for unauthorized plugins.

Remediation

Patch, then assume compromise.

Upgrade Piwik/Matomo to version 3.0.3 or later. In fixed versions, plugin upload functionality is disabled by default unless explicitly enabled in the configuration file. Review configuration to ensure plugin upload is not enabled unless operationally required. Audit installed plugins for unauthorized or untrusted packages, remove any suspicious plugins, and rotate credentials if compromise is suspected.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.

VALID 1 / 1 TOTALView more in app

piwik_superuser_plugin_upload.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit module: 'Piwik Superuser Plugin Upload'. The module exploits a vulnerability (CVE-2025-34104) in Piwik (now Matomo) analytics software, allowing authenticated superusers to upload and activate a malicious plugin, resulting in remote code execution. The exploit requires valid superuser credentials and targets Piwik versions 2.14.0, 2.16.0, 2.17.1, and 3.0.1. For versions >= 3.0.3, custom plugin uploads must be enabled in the configuration. The module generates a ZIP archive containing a PHP payload as a plugin, uploads it via the web interface, and activates it to trigger code execution. The main endpoints targeted are the Piwik installation's '/index.php' and, for version detection, '/themes/default/images/logo.svg'. The exploit is weaponized, leveraging Metasploit's payload system to provide customizable PHP shells or other payloads.

Disclosed Feb 5, 2017rubynetwork

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Oracle CorporationWeb Analyticsapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

3 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3