# CVE-2020-36196: Stored XSS Vulnerability in QuLog Center

> Attackers can inject malicious scripts into QuLog Center, potentially executing code or hijacking user sessions on QNAP NAS devices.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 1 Jul 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-8vmw-c4hx-3j5r

## What is CVE-2020-36196?

CVE-2020-36196 is a medium-severity cross-site scripting vulnerability in QNAP Systems Inc. QuLog Center, published on 1 Jul 2021. 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

A stored XSS vulnerability has been reported to affect QNAP NAS running QuLog Center. If exploited, this vulnerability allows attackers to inject malicious code. This issue affects: QNAP Systems Inc. QuLog Center versions prior to 1.2.0.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2020-36196?

It affects 1 product.


Products: Qnap Qulog Center.

## How do I fix CVE-2020-36196?

No fix has been published for CVE-2020-36196 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-36196 being exploited?

There is no known exploitation of CVE-2020-36196 in the wild and no public exploit code.

## Other vulnerabilities in QNAP Systems Inc. QuLog Center

- [CVE-2024-48862](https://insights.sbomify.com/CVE-2024-48862/): QuLog Center (high 8.7)
- [CVE-2024-32762](https://insights.sbomify.com/CVE-2024-32762/): QuLog Center (high 8.2)
- [CVE-2023-23354](https://insights.sbomify.com/CVE-2023-23354/): QuLog Center (high 7.3)
- [CVE-2023-23357](https://insights.sbomify.com/CVE-2023-23357/): QuLog Center (medium 4.8)
- [CVE-2025-54168](https://insights.sbomify.com/CVE-2025-54168/): QuLog Center (low 2.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-36196 and fix it if it is affected.

What it is: CVE-2020-36196 is a medium-severity cross-site scripting vulnerability in QNAP Systems Inc. QuLog Center, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-36196 in the wild and no public exploit code.

Affected product: QNAP Systems Inc. QuLog Center. 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-2020-36196/ (Markdown: https://insights.sbomify.com/CVE-2020-36196/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-36196
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-36196
- OSV: https://osv.dev/vulnerability/CVE-2020-36196

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-36196/
Summaries are generated and may contain mistakes; the official description above is the record.