# CVE-2025-9816: WP Statistics <= 14.5.4 - Unauthenticated Stored Cross-Site Scripting via User-Agent Header

> Unauthenticated attackers can inject arbitrary scripts via the User-Agent header, leading to stored XSS execution for site visitors.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Sep 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-v8h5-jm3h-5252

## What is CVE-2025-9816?

CVE-2025-9816 is a high-severity cross-site scripting vulnerability in veronalabs WP Statistics – Simple, privacy-friendly Google Analytics alternative, published on 27 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The WP Statistics – The Most Popular Privacy-Friendly Analytics Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the User-Agent Header in all versions up to, and including, 14.5.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-9816?


## How do I fix CVE-2025-9816?

No fix has been published for CVE-2025-9816 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-9816 being exploited?

There is no known exploitation of CVE-2025-9816 in the wild and no public exploit code.

Public exploit code:

- Proof of Concept for Stored-XSS on Vulnerable WP-Statistics Plugin known as CVE-2025-9816 (github_poc): https://github.com/monzaviman/CVE-2025-9816

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-9816 and fix it if it is affected.

What it is: CVE-2025-9816 is a high-severity cross-site scripting vulnerability in veronalabs WP Statistics – Simple, privacy-friendly Google Analytics alternative, published on 27 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-9816 in the wild and no public exploit code.

Affected product: veronalabs WP Statistics – Simple, privacy-friendly Google Analytics alternative. 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-2025-9816/ (Markdown: https://insights.sbomify.com/CVE-2025-9816/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-9816
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9816
- OSV: https://osv.dev/vulnerability/CVE-2025-9816

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-9816/
Summaries are generated and may contain mistakes; the official description above is the record.