# CVE-2021-39350: FV Flowplayer Video Player <= 7.5.0.727 - 7.5.2.727 Reflected Cross-Site Scripting

> Attackers can inject arbitrary web scripts via the player_id parameter in the FV Flowplayer Video Player WordPress plugin, potentially compromising user sessions.

- **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:** 6 Oct 2021
- **Updated:** 14 Feb 2025
- **Also known as:** GHSA-jfxr-v6vh-5957

## What is CVE-2021-39350?

CVE-2021-39350 is a medium-severity cross-site scripting vulnerability in FV Flowplayer Video Player, published on 6 Oct 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

The FV Flowplayer Video Player WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the player_id parameter found in the ~/view/stats.php file which allows attackers to inject arbitrary web scripts, in versions 7.5.0.727 - 7.5.2.727.

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

## Which versions are affected by CVE-2021-39350?

It affects 1 product.


Products: Foliovision Fv Flowplayer Video Player.

## How do I fix CVE-2021-39350?

No fix has been published for CVE-2021-39350 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-39350 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-39350 exists.

Public exploit code:

- FV Flowplayer Video Player WordPress plugin - Authenticated Cross-Site Scripting (nuclei): http/cves/2021/CVE-2021-39350.yaml

## Other vulnerabilities in FV Flowplayer Video Player

- [CVE-2019-14801](https://insights.sbomify.com/CVE-2019-14801/): SQL injection in n/a (critical 9.8)
- [CVE-2019-13573](https://insights.sbomify.com/CVE-2019-13573/): SQL injection in n/a (critical 9.8)
- [CVE-2024-6338](https://insights.sbomify.com/CVE-2024-6338/): FV Player <= 7.5.46.7212 - Authenticated (Subscriber+) SQL Injection via exclude Parameter (high 8.8)
- [CVE-2023-30499](https://insights.sbomify.com/CVE-2023-30499/): WordPress FV Flowplayer Video Player Plugin <= 7.5.32.7212 is vulnerable to Cross Site Scripting (XSS) (high 7.1)
- [CVE-2022-25607](https://insights.sbomify.com/CVE-2022-25607/): WordPress FV Flowplayer Video Player plugin <= 7.5.15.727 - SQL Injection (SQLi) vulnerability (medium 6.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-39350 and fix it if it is affected.

What it is: CVE-2021-39350 is a medium-severity cross-site scripting vulnerability in FV Flowplayer Video Player, published on 6 Oct 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-39350 exists.

Affected product: FV Flowplayer Video Player. 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-2021-39350/ (Markdown: https://insights.sbomify.com/CVE-2021-39350/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-39350
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-39350
- OSV: https://osv.dev/vulnerability/CVE-2021-39350

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-39350/
Summaries are generated and may contain mistakes; the official description above is the record.