# CVE-2017-15890: Cross-site scripting in MailPlus Server

> Remote authenticated users can inject arbitrary web script or HTML via the NAME parameter in Synology MailPlus Server.

- **Severity:** Medium 4.8 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Dec 2017
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rxvm-4jfj-965p

## What is CVE-2017-15890?

CVE-2017-15890 is a medium-severity cross-site scripting vulnerability in Synology MailPlus Server, published on 15 Dec 2017. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Cross-site scripting (XSS) vulnerability in Disclaimer in Synology MailPlus Server before 1.4.0-0415 allows remote authenticated users to inject arbitrary web script or HTML via the NAME parameter.

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

## Which versions are affected by CVE-2017-15890?

It affects 1 product.


Products: Synology Mailplus Server.

## How do I fix CVE-2017-15890?

No fix has been published for CVE-2017-15890 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-15890 being exploited?

There is no known exploitation of CVE-2017-15890 in the wild and no public exploit code.

## Other vulnerabilities in Synology MailPlus Server

- [CVE-2018-13296](https://insights.sbomify.com/CVE-2018-13296/): Denial of service in MailPlus Server (high 7.5)
- [CVE-2017-16768](https://insights.sbomify.com/CVE-2017-16768/): Cross-site scripting in n/a (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-15890 and fix it if it is affected.

What it is: CVE-2017-15890 is a medium-severity cross-site scripting vulnerability in Synology MailPlus Server, published on 15 Dec 2017. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2017-15890 in the wild and no public exploit code.

Affected product: Synology MailPlus Server. 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-2017-15890/ (Markdown: https://insights.sbomify.com/CVE-2017-15890/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-15890
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-15890
- OSV: https://osv.dev/vulnerability/CVE-2017-15890

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-15890/
Summaries are generated and may contain mistakes; the official description above is the record.