# CVE-2019-20897: File upload in Jira Server

> Remote attackers can cause denial of service in Atlassian Jira Server by uploading a crafted PNG file via the avatar feature.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Jul 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-vr57-f797-cqc5

## What is CVE-2019-20897?

CVE-2019-20897 is a medium-severity vulnerability in Atlassian Jira, published on 13 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The avatar upload feature in affected versions of Atlassian Jira Server and Data Center allows remote attackers to achieve Denial of Service via a crafted PNG file. The affected versions are before version 8.5.4, from version 8.6.0 before 8.6.2, and from version 8.7.0 before 8.7.1.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2019-20897?

It affects 4 products.


Products: Atlassian Jira, Atlassian Jira Data Center, Atlassian Jira Server, Atlassian Jira Software Data Center.

## How do I fix CVE-2019-20897?

No fix has been published for CVE-2019-20897 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-20897 being exploited?

There is no known exploitation of CVE-2019-20897 in the wild and no public exploit code.

## Other vulnerabilities in Atlassian Jira

- [CVE-2020-14172](https://insights.sbomify.com/CVE-2020-14172/): Deserialization in Jira Server (critical 9.8)
- [CVE-2019-20409](https://insights.sbomify.com/CVE-2019-20409/): Code injection in Jira Server (critical 9.8)
- [CVE-2017-5983](https://insights.sbomify.com/CVE-2017-5983/): Deserialization in n/a (critical 9.8)
- [CVE-2010-1165](https://insights.sbomify.com/CVE-2010-1165/): Code injection in n/a (critical 9.0)
- [CVE-2016-4319](https://insights.sbomify.com/CVE-2016-4319/): Cross-site request forgery in Atlassian JIRA Server before 7.1.9 (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-20897 and fix it if it is affected.

What it is: CVE-2019-20897 is a medium-severity vulnerability in Atlassian Jira, published on 13 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-20897 in the wild and no public exploit code.

Affected product: Atlassian Jira. 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-2019-20897/ (Markdown: https://insights.sbomify.com/CVE-2019-20897/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-20897
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-20897
- OSV: https://osv.dev/vulnerability/CVE-2019-20897

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-20897/
Summaries are generated and may contain mistakes; the official description above is the record.