CVE-2021-43956: Atlassian Crucible

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Atlassian Crucible: before 4.8.9 (fixed in 4.8.9)
• Atlassian Fisheye: before 4.8.9 (fixed in 4.8.9)

Published 2022-03-16. Last modified 2026-06-17.