# CVE-2025-34104: Piwik Authenticated RCE via Custom Plugin Upload

> Authenticated superusers can upload malicious plugins to execute arbitrary code, requiring configuration changes to disable the feature in newer versions.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2025
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-7p5r-mwrp-qhhq

## What is CVE-2025-34104?

CVE-2025-34104 is a critical vulnerability in Piwik (now Matomo) Web Analytics Platform, published on 15 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official 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.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2025-34104?


## How do I fix CVE-2025-34104?

No fix has been published for CVE-2025-34104 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34104 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34104 exists.

Public exploit code:

- Piwik Superuser Plugin Upload (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34104 and fix it if it is affected.

What it is: CVE-2025-34104 is a critical vulnerability in Piwik (now Matomo) Web Analytics Platform, published on 15 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34104 exists.

Affected product: Piwik (now Matomo) Web Analytics Platform. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34104/ (Markdown: https://insights.sbomify.com/CVE-2025-34104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34104
- OSV: https://osv.dev/vulnerability/CVE-2025-34104

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34104/
Summaries are generated and may contain mistakes; the official description above is the record.