# CVE-2026-16066: Welcart e-Commerce < 2.11.34 - Author+ Stored XSS via Product Name

> Authors can inject scripts into product names, executing code in visitors' browsers via the Welcart e-Commerce plugin.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Aug 2026
- **Updated:** 12 Aug 2026
- **Also known as:** GHSA-xgc5-xxmg-c9x4

## What is CVE-2026-16066?

CVE-2026-16066 is a medium-severity cross-site scripting vulnerability in Unknown Welcart e-Commerce, published on 12 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Welcart e-Commerce WordPress plugin before 2.11.34 does not sanitise or escape a product field before outputting it on the product pages, allowing users with the Author role and above to inject arbitrary web scripts that execute in the browser of any visitor viewing the product page.

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

## Which versions are affected by CVE-2026-16066?


## How do I fix CVE-2026-16066?

No fix has been published for CVE-2026-16066 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16066 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16066 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16066 and fix it if it is affected.

What it is: CVE-2026-16066 is a medium-severity cross-site scripting vulnerability in Unknown Welcart e-Commerce, published on 12 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16066 exists.

Affected product: Unknown Welcart e-Commerce. 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-2026-16066/ (Markdown: https://insights.sbomify.com/CVE-2026-16066/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16066
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16066
- OSV: https://osv.dev/vulnerability/CVE-2026-16066

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16066/
Summaries are generated and may contain mistakes; the official description above is the record.