# CVE-2019-20900: Cross-site scripting in Jira Server

> Remote attackers can inject arbitrary HTML or JavaScript via XSS in the Add Field module, potentially leading to code execution or account takeover.

- **Severity:** Medium 4.8 (`CVSS:3.1/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:** 13 Jul 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-m64g-rw84-6789

## What is CVE-2019-20900?

CVE-2019-20900 is a medium-severity cross-site scripting vulnerability in Atlassian Jira Data Center, published on 13 Jul 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the Add Field module. The affected versions are before version 8.7.0.

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

## Which versions are affected by CVE-2019-20900?

It affects 2 products.


Products: Atlassian Jira Data Center, Atlassian Jira Server.

## How do I fix CVE-2019-20900?

No fix has been published for CVE-2019-20900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-20900 being exploited?

There is no known exploitation of CVE-2019-20900 in the wild and no public exploit code.

## Other vulnerabilities in Atlassian Jira Data Center

- [CVE-2021-26086](https://insights.sbomify.com/CVE-2021-26086/): Atlassian Jira Server and Data Center Path Traversal (medium 5.3, exploited in the wild)
- [CVE-2022-0540](https://insights.sbomify.com/CVE-2022-0540/): Auth bypass in Jira Core Server (critical 9.8)
- [CVE-2020-36239](https://insights.sbomify.com/CVE-2020-36239/): Deserialization in Jira Core Data Center (critical 9.8)
- [CVE-2025-22167](https://insights.sbomify.com/CVE-2025-22167/): Path traversal in Jira Software Data Center (high 8.7)
- [CVE-2019-20419](https://insights.sbomify.com/CVE-2019-20419/): Other in Jira Server (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-20900 and fix it if it is affected.

What it is: CVE-2019-20900 is a medium-severity cross-site scripting vulnerability in Atlassian Jira Data Center, published on 13 Jul 2020. 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-2019-20900 in the wild and no public exploit code.

Affected product: Atlassian Jira Data Center. 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-2019-20900/ (Markdown: https://insights.sbomify.com/CVE-2019-20900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-20900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-20900
- OSV: https://osv.dev/vulnerability/CVE-2019-20900

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-20900/
Summaries are generated and may contain mistakes; the official description above is the record.