# CVE-2019-0777: Cross-site scripting in Team Foundation Server

> An attacker can execute arbitrary scripts in the context of other users via unsanitized input in Team Foundation Server.

- **Severity:** Medium 5.4 (`CVSS:3.0/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:** 9 Apr 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-5h3x-73w2-c5q7

## What is CVE-2019-0777?

CVE-2019-0777 is a medium-severity cross-site scripting vulnerability in Microsoft Team Foundation Server, published on 9 Apr 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 Team Foundation Server does not properly sanitize user provided input, aka 'Team Foundation Server Cross-site Scripting Vulnerability'.

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

## Which versions are affected by CVE-2019-0777?

It affects 1 product.


Products: Microsoft Team Foundation Server.

## How do I fix CVE-2019-0777?

No fix has been published for CVE-2019-0777 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-0777 being exploited?

There is no known exploitation of CVE-2019-0777 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Team Foundation Server

- [CVE-2018-8529](https://insights.sbomify.com/CVE-2018-8529/): Missing authorization in Team (critical 9.8)
- [CVE-2019-0647](https://insights.sbomify.com/CVE-2019-0647/): Information disclosure in Team (medium 6.5)
- [CVE-2019-0742](https://insights.sbomify.com/CVE-2019-0742/): Cross-site scripting in Team Foundation Server 2018 (medium 5.4)
- [CVE-2019-0743](https://insights.sbomify.com/CVE-2019-0743/): Cross-site scripting in Team Foundation Server 2018 (medium 5.4)
- [CVE-2019-0646](https://insights.sbomify.com/CVE-2019-0646/): Cross-site scripting in Team (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-0777 and fix it if it is affected.

What it is: CVE-2019-0777 is a medium-severity cross-site scripting vulnerability in Microsoft Team Foundation Server, published on 9 Apr 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-2019-0777 in the wild and no public exploit code.

Affected product: Microsoft Team Foundation 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-2019-0777/ (Markdown: https://insights.sbomify.com/CVE-2019-0777/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-0777
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-0777
- OSV: https://osv.dev/vulnerability/CVE-2019-0777

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-0777/
Summaries are generated and may contain mistakes; the official description above is the record.