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TI-2021-08024 Aliases CVE-2021-26072GHSA-889g-gr2g-424w

Server-side request forgery in Atlassian Confluence Server

Priority MEDIUM 48CWE-918Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attackers to manipulate the content of internal network resources via a blind Server-Side Request Forgery (SSRF) vulnerability.

Why it matters now

EPSS 0.41219 98th percentileScored 2026-11-07
Fix Fixed Confluence Server (Atlassian): 5.8.6Confluence Data Center (Atlassian): 5.8.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
AtlassianConfluence Serverbefore 5.8.65.8.6Patch availableCNA
AtlassianConfluence Data Centerbefore 5.8.65.8.6Patch availableCNA
  • Confluence Server VendorAtlassian Affected before 5.8.6 Fixed in 5.8.6 Patch available CNA
  • Confluence Data Center VendorAtlassian Affected before 5.8.6 Fixed in 5.8.6 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*before 5.8.6VulnerableAtlassian
cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*before 5.8.6VulnerableAtlassian
  • cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:* Versions before 5.8.6 Vulnerable ·Atlassian
  • cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:* Versions before 5.8.6 Vulnerable ·Atlassian

Remediation

  • Fix · CNA Confluence Server (Atlassian) Fixed in 5.8.6
  • Fix · CNA Confluence Data Center (Atlassian) Fixed in 5.8.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26072
  2. 2026-10-03 Alias added: GHSA-889g-gr2g-424w

References

Patch 1

  • TI-2023-08765 Injection in Atlassian Confluence Data Center KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-08757 Improper input validation in Atlassian Confluence Data Center KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09596 Expression language injection in Atlassian Confluence Data Center KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-08036 Expression language injection in Atlassian Confluence Server KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-67904 Arbitrary file access in Atlassian Data Center products KEVCVSS 4.0CRITICAL 9.3
  • TI-2023-08759 Incorrect authorization in Atlassian Confluence Data Center KEVCVSS 3.1CRITICAL 9.8
See all 38 →

Sources

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