# CVE-2017-8550: Cross-site scripting in Skype for Business

> Attackers can execute arbitrary code remotely by exploiting a cross-site scripting flaw in Skype for Business content sanitization.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 15 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-5r97-fxfw-c4wj

## What is CVE-2017-8550?

CVE-2017-8550 is a medium-severity cross-site scripting vulnerability in Microsoft Office, published on 15 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A remote code execution vulnerability exists in Skype for Business when the software fails to sanitize specially crafted content, aka "Skype for Business Remote Code Execution Vulnerability".

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

## Which versions are affected by CVE-2017-8550?

It affects 1 product.


Products: Microsoft Office.

## How do I fix CVE-2017-8550?

No fix has been published for CVE-2017-8550 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-8550 being exploited?

There is no known exploitation of CVE-2017-8550 in the wild and no public exploit code.

Public exploit code:

- Skype for Business 2016 - Cross-Site Scripting (exploitdb)

## Other vulnerabilities in Microsoft Office

- [CVE-2018-0798](https://insights.sbomify.com/CVE-2018-0798/): Microsoft Office Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2015-1770](https://insights.sbomify.com/CVE-2015-1770/): Microsoft Office Uninitialized Memory Use (high 8.8, exploited in the wild)
- [CVE-2006-2492](https://insights.sbomify.com/CVE-2006-2492/): Microsoft Word Malformed Object Pointer (high 8.8, exploited in the wild)
- [CVE-2018-0802](https://insights.sbomify.com/CVE-2018-0802/): Microsoft Office Memory Corruption (high 7.8, exploited in the wild)
- [CVE-2017-11882](https://insights.sbomify.com/CVE-2017-11882/): Microsoft Office Memory Corruption (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-8550 and fix it if it is affected.

What it is: CVE-2017-8550 is a medium-severity cross-site scripting vulnerability in Microsoft Office, published on 15 Jun 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-2017-8550 in the wild and no public exploit code.

Affected product: Microsoft Office. 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-2017-8550/ (Markdown: https://insights.sbomify.com/CVE-2017-8550/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-8550
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-8550
- OSV: https://osv.dev/vulnerability/CVE-2017-8550

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-8550/
Summaries are generated and may contain mistakes; the official description above is the record.