# CVE-2026-104479: Shopclass before 6.2.0 Stored XSS via Listing Description Field

> Attackers can inject malicious scripts into listing descriptions, executing code in the site origin for visitors when TinyMCE is enabled.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA: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:** 2 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-3gwr-hcgg-p3rv

## What is CVE-2026-104479?

CVE-2026-104479 is a medium-severity cross-site scripting vulnerability in mindstellar shopclass, published on 2 Oct 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

Shopclass before 6.2.0 contains a stored cross-site scripting vulnerability that allows self-registered non-admin users to inject scripts into item listing descriptions when frontend TinyMCE is enabled. Attackers can submit malicious JavaScript, which ItemActions.php saves without tag stripping, causing it to execute in the site origin for any visitor viewing the listing.

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

## Which versions are affected by CVE-2026-104479?


## How do I fix CVE-2026-104479?

No fix has been published for CVE-2026-104479 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104479 being exploited?

There is no known exploitation of CVE-2026-104479 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104479 and fix it if it is affected.

What it is: CVE-2026-104479 is a medium-severity cross-site scripting vulnerability in mindstellar shopclass, published on 2 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-104479 in the wild and no public exploit code.

Affected product: mindstellar shopclass. 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-2026-104479/ (Markdown: https://insights.sbomify.com/CVE-2026-104479/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104479
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104479
- OSV: https://osv.dev/vulnerability/CVE-2026-104479

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104479/
Summaries are generated and may contain mistakes; the official description above is the record.