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TI-2021-19718 Aliases CVE-2021-43956GHSA-9p4g-cjcf-q3x2

Prototype pollution in Atlassian Fisheye

Priority LOW 29CWE-1321Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00731 54th percentileScored 2026-11-07
Fix Fixed Fisheye (Atlassian): 4.8.9Crucible (Atlassian): 4.8.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AtlassianFisheyebefore 4.8.94.8.9Patch availableCNA
AtlassianCruciblebefore 4.8.94.8.9Patch availableCNA
  • Fisheye VendorAtlassian Affected before 4.8.9 Fixed in 4.8.9 Patch available CNA
  • Crucible VendorAtlassian Affected before 4.8.9 Fixed in 4.8.9 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:atlassian:crucible:*:*:*:*:*:*:*:*before 4.8.9VulnerableAtlassian
cpe:2.3:a:atlassian:fisheye:*:*:*:*:*:*:*:*before 4.8.9VulnerableAtlassian
  • cpe:2.3:a:atlassian:crucible:*:*:*:*:*:*:*:* Versions before 4.8.9 Vulnerable ·Atlassian
  • cpe:2.3:a:atlassian:fisheye:*:*:*:*:*:*:*:* Versions before 4.8.9 Vulnerable ·Atlassian

Remediation

  • Fix · CNA Fisheye (Atlassian) Fixed in 4.8.9
  • Fix · CNA Crucible (Atlassian) Fixed in 4.8.9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Atlassian Crucible, Fisheye 4.8.9

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2021-19720 Missing brute-force protection in Atlassian FisheyePriority MEDIUM 52
    • TI-2021-19719 Authorization bypass in Atlassian FisheyePriority MEDIUM 41
    • TI-2021-19717 The /rest-service-fecru/server-v1 resource in Fisheye and Crucible before version 4.8.9…Priority LOW 22
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43956
  2. 2026-10-03 Alias added: GHSA-9p4g-cjcf-q3x2

References

Advisory 2

  • TI-2026-67904 Arbitrary file access in Atlassian Data Center products KEVCVSS 4.0CRITICAL 9.3
  • TI-2024-14399 Code injection in Atlassian Confluence Data Center CVSS 3.1HIGH 8.8
  • TI-2012-02540 Atlassian JIRA before 5.0.1; Confluence before 3.5.16, 4.0 before 4.0.7, and 4.1 before… CVSS 3.1CRITICAL 9.1
  • TI-2022-09598 Improper authentication in Atlassian Bamboo Server CVSS 3.1CRITICAL 9.8
  • TI-2021-19720 Missing brute-force protection in Atlassian Fisheye CVSS 3.1CRITICAL 9.8
  • TI-2017-12407 It was possible for double OGNL evaluation in certain redirect action and in WebWork URL… CVSS 3.0CRITICAL 9.8
See all 52 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences