# CVE-2017-16766: Cross-site scripting in DiskStation Manager (DSM)

> Local attackers can inject arbitrary scripts via the synodsmnotify tool, potentially leading to code execution or security bypasses in Synology DSM.

- **Severity:** Medium 6.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Dec 2017
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-59q4-wg74-fxmm

## What is CVE-2017-16766?

CVE-2017-16766 is a medium-severity cross-site scripting vulnerability in Synology Diskstation Manager, published on 22 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An improper access control vulnerability in synodsmnotify in Synology DiskStation Manager (DSM) before 6.1.4-15217 and before 6.0.3-8754-6 allows local users to inject arbitrary web script or HTML via the -fn option.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2017-16766?

It affects 1 product.


Products: Synology Diskstation Manager.

## How do I fix CVE-2017-16766?

No fix has been published for CVE-2017-16766 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-16766 being exploited?

There is no known exploitation of CVE-2017-16766 in the wild and no public exploit code.

## Other vulnerabilities in Synology Diskstation Manager

- [CVE-2022-27624](https://insights.sbomify.com/CVE-2022-27624/): Memory corruption in DiskStation Manager (DSM) (critical 10.0)
- [CVE-2022-27625](https://insights.sbomify.com/CVE-2022-27625/): Memory corruption in DiskStation Manager (DSM) (critical 10.0)
- [CVE-2022-27626](https://insights.sbomify.com/CVE-2022-27626/): Race condition in DiskStation Manager (DSM) (critical 10.0)
- [CVE-2013-6955](https://insights.sbomify.com/CVE-2013-6955/): Path traversal in n/a (critical 10.0)
- [CVE-2022-22687](https://insights.sbomify.com/CVE-2022-22687/): Memory corruption in DiskStation Manager (DSM) (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-16766 and fix it if it is affected.

What it is: CVE-2017-16766 is a medium-severity cross-site scripting vulnerability in Synology Diskstation Manager, published on 22 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-16766 in the wild and no public exploit code.

Affected product: Synology Diskstation Manager. 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-2017-16766/ (Markdown: https://insights.sbomify.com/CVE-2017-16766/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-16766
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-16766
- OSV: https://osv.dev/vulnerability/CVE-2017-16766

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-16766/
Summaries are generated and may contain mistakes; the official description above is the record.