# CVE-2021-39116: Denial of service in Jira Data Center

> Remote attackers can cause a Denial of Service in Atlassian Jira Server and Data Center via the GIF Image Reader component.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Sep 2021
- **Updated:** 10 Oct 2024
- **Also known as:** GHSA-225q-rmfw-6pfr

## What is CVE-2021-39116?

CVE-2021-39116 is a medium-severity denial of service vulnerability in Atlassian Jira Data Center, published on 8 Sep 2021. It can only be exploited from the same machine or local network, 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 impact the application's availability via a Denial of Service (DoS) vulnerability in the GIF Image Reader component. The affected versions are before version 8.13.14, and from version 8.14.0 before 8.19.0.

## Which versions are affected by CVE-2021-39116?

It affects 2 products.


Products: Atlassian Jira Data Center, Atlassian Jira Server.

## How do I fix CVE-2021-39116?

No fix has been published for CVE-2021-39116 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-39116 being exploited?

There is no known exploitation of CVE-2021-39116 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-2021-39116 and fix it if it is affected.

What it is: CVE-2021-39116 is a medium-severity denial of service vulnerability in Atlassian Jira Data Center, published on 8 Sep 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-39116 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-2021-39116/ (Markdown: https://insights.sbomify.com/CVE-2021-39116/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-39116
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-39116
- OSV: https://osv.dev/vulnerability/CVE-2021-39116

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-39116/
Summaries are generated and may contain mistakes; the official description above is the record.