Auth bypass in Piwik (Now Matomo) Web Analytics Platform
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.
Vulnerability class: Broken Authentication
Published · last modified .
EPSS exploit prediction
EPSS: 0.018 (77.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.018 · change: +0.002
Affected products
- Piwik (Now Matomo) Web Analytics Platform — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- matomo.org/changelog/piwik-3-0-3/ (vendor-advisory)
- matomo.org/faq/plugins/faq_21/ (product)
- firefart.at/post/turning_piwik_superuser_creds_into_rce/ (third-party-advisory)
- raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/u… (exploit)
- www.vulncheck.com/advisories/piwik-authenticated-rce-via-custom-plugin-upload (third-party-advisory)
Frequently asked questions
- What is CVE-2025-34104?
- CVE-2025-34104 is a vulnerability in Piwik (Now Matomo) Web Analytics Platform, classified under Missing Authentication for Critical Function. Published 2025-07-15.
- Is CVE-2025-34104 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.