# CVE-2019-0558: Cross-site scripting in Microsoft Business Productivity Servers

> Attackers can execute arbitrary scripts in user browsers via unsanitized web requests in Microsoft SharePoint Server.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Jan 2019
- **Updated:** 28 Feb 2025
- **Also known as:** GHSA-rvmf-46hh-x3rp

## What is CVE-2019-0558?

CVE-2019-0558 is a medium-severity cross-site scripting vulnerability in Microsoft Sharepoint Server, published on 8 Jan 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

A cross-site-scripting (XSS) vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server, aka "Microsoft Office SharePoint XSS Vulnerability." This affects Microsoft SharePoint Server, Microsoft SharePoint, Microsoft Business Productivity Servers. This CVE ID is unique from CVE-2019-0556, CVE-2019-0557.

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

## Which versions are affected by CVE-2019-0558?

It affects 2 products.


Products: Microsoft Business Productivity Servers, Microsoft Sharepoint Server.

## How do I fix CVE-2019-0558?

No fix has been published for CVE-2019-0558 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-0558 being exploited?

There is no known exploitation of CVE-2019-0558 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Sharepoint Server

- [CVE-2021-27076](https://insights.sbomify.com/CVE-2021-27076/): Microsoft SharePoint Server Remote Code Execution Vulnerability (high 8.8)
- [CVE-2020-0931](https://insights.sbomify.com/CVE-2020-0931/): File upload in Microsoft Business Productivity Servers (high 8.8)
- [CVE-2017-0243](https://insights.sbomify.com/CVE-2017-0243/): Memory corruption in Microsoft Office 2007 SP2 and SP3, Microsoft Office 2010 SP2, Microsoft Office Web Apps 2010 SP2, and Microsoft Business Productivity Servers 2010 SP2. (high 7.8)
- [CVE-2020-0795](https://insights.sbomify.com/CVE-2020-0795/): Cross-site scripting in Microsoft Business Productivity Servers (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-0558 and fix it if it is affected.

What it is: CVE-2019-0558 is a medium-severity cross-site scripting vulnerability in Microsoft Sharepoint Server, published on 8 Jan 2019. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-0558 in the wild and no public exploit code.

Affected product: Microsoft Sharepoint 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-2019-0558/ (Markdown: https://insights.sbomify.com/CVE-2019-0558/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-0558
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-0558
- OSV: https://osv.dev/vulnerability/CVE-2019-0558

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-0558/
Summaries are generated and may contain mistakes; the official description above is the record.