# CVE-2021-47981: Quick.CMS 6.7 Cross-Site Scripting via CSRF to Sliders Form

> Authenticated attackers can inject malicious scripts via CSRF in the sliders form, leading to arbitrary JavaScript execution in victim browsers.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 May 2026
- **Updated:** 24 May 2026
- **Also known as:** GHSA-g33h-xxgx-7c28

## What is CVE-2021-47981?

CVE-2021-47981 is a medium-severity cross-site scripting vulnerability in Opensolution Quick.CMS, published on 16 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Quick.CMS 6.7 contains a cross-site scripting vulnerability in the sliders form that allows authenticated attackers to inject malicious scripts by submitting XSS payloads through the sDescription parameter. Attackers can craft CSRF forms targeting the admin.php?p=sliders-form endpoint to execute arbitrary JavaScript in victim browsers when the form is submitted.

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

## Which versions are affected by CVE-2021-47981?


## How do I fix CVE-2021-47981?

No fix has been published for CVE-2021-47981 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47981 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47981 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47981 and fix it if it is affected.

What it is: CVE-2021-47981 is a medium-severity cross-site scripting vulnerability in Opensolution Quick.CMS, published on 16 May 2026. An attacker can exploit it over the internet without logging in, 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-2021-47981 exists.

Affected product: Opensolution Quick.CMS. 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-2021-47981/ (Markdown: https://insights.sbomify.com/CVE-2021-47981/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47981
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47981
- OSV: https://osv.dev/vulnerability/CVE-2021-47981

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47981/
Summaries are generated and may contain mistakes; the official description above is the record.