# CVE-2021-47908: Ultimate POS 4.4 Persistent Cross-Site Scripting via Product Name

> Remote attackers can inject malicious scripts via product names in Ultimate POS, potentially hijacking user sessions and executing arbitrary JavaScript.

- **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:** 1 Feb 2026
- **Updated:** 2 Feb 2026
- **Also known as:** GHSA-p8xp-337m-35c6

## What is CVE-2021-47908?

CVE-2021-47908 is a medium-severity cross-site scripting vulnerability in thewebfosters Unknown, published on 1 Feb 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

Ultimate POS 4.4 contains a persistent cross-site scripting vulnerability in the product name parameter that allows remote attackers to inject malicious scripts. Attackers can exploit the vulnerability through product add or edit functions to execute arbitrary JavaScript and potentially hijack user sessions.

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

## Which versions are affected by CVE-2021-47908?


## How do I fix CVE-2021-47908?

No fix has been published for CVE-2021-47908 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47908 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47908 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47908 and fix it if it is affected.

What it is: CVE-2021-47908 is a medium-severity cross-site scripting vulnerability in thewebfosters Unknown, published on 1 Feb 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-2021-47908 exists.

Affected product: thewebfosters Unknown. 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-2021-47908/ (Markdown: https://insights.sbomify.com/CVE-2021-47908/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47908
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47908
- OSV: https://osv.dev/vulnerability/CVE-2021-47908

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-47908/
Summaries are generated and may contain mistakes; the official description above is the record.