Remote Code Execution Vulnerability in Matomo by Influx of Malicious Plugins
CVE-2025-34104

9.4CRITICAL

Key Information:

Vendor

Piwik (now Matomo)

Status
Web Analytics Platform
Vendor
CVE Published:
15 July 2025

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 52%

What is CVE-2025-34104?

An authenticated remote code execution vulnerability allows users with Superuser privileges to upload and activate malicious plugins in Matomo versions before 3.0.3. This enables arbitrary PHP code execution on the host system due to the inadequate validation of uploaded ZIP archives. As a precaution, Matomo disabled plugin upload functionality starting with version 3.0.3 unless it is explicitly enabled in the configuration file.

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Affected Version(s)

Web Analytics Platform * < 3.0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-34104 - Proof of Concept

References

https://matomo.org/changelog/piwik-3-0-3/
vendor-advisory
https://matomo.org/faq/plugins/faq_21/
product
https://firefart.at/post/turning_piwik_superuser_creds_in...
third-party-advisory

EPSS Score

52% chance of being exploited in the next 30 days.

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

FireFart
JSON
.