# CVE-2021-33181: Server-side request forgery in Synology Video Station

> Authenticated attackers can exploit SSRF in Synology Video Station to access internal network resources, requiring an upgrade to mitigate.

- **Severity:** Medium 6.6 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jun 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-6q24-858g-34rg

## What is CVE-2021-33181?

CVE-2021-33181 is a medium-severity server-side request forgery vulnerability in Synology Video Station, published on 1 Jun 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Server-Side Request Forgery (SSRF) vulnerability in webapi component in Synology Video Station before 2.4.10-1632 allows remote authenticated users to send arbitrary request to intranet resources via unspecified vectors.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2021-33181?

It affects 1 product.


Products: Synology Video Station.

## How do I fix CVE-2021-33181?

No fix has been published for CVE-2021-33181 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-33181 being exploited?

There is no known exploitation of CVE-2021-33181 in the wild and no public exploit code.

## Other vulnerabilities in Synology Video Station

- [CVE-2015-6912](https://insights.sbomify.com/CVE-2015-6912/): Command injection in n/a (critical 10.0)
- [CVE-2015-6910](https://insights.sbomify.com/CVE-2015-6910/): SQL injection in n/a (high 7.5)
- [CVE-2015-6911](https://insights.sbomify.com/CVE-2015-6911/): SQL injection in n/a (high 7.5)
- [CVE-2017-9556](https://insights.sbomify.com/CVE-2017-9556/): Cross-site scripting in Synology Video Station (medium 5.4)
- [CVE-2015-9105](https://insights.sbomify.com/CVE-2015-9105/): Cross-site scripting in Video Station (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-33181 and fix it if it is affected.

What it is: CVE-2021-33181 is a medium-severity server-side request forgery vulnerability in Synology Video Station, published on 1 Jun 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-33181 in the wild and no public exploit code.

Affected product: Synology Video Station. 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-2021-33181/ (Markdown: https://insights.sbomify.com/CVE-2021-33181/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-33181
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-33181
- OSV: https://osv.dev/vulnerability/CVE-2021-33181

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-33181/
Summaries are generated and may contain mistakes; the official description above is the record.