VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVReported exploited: VulnCheck KEV since Published EPSS 41.2% probability of exploitation in 30 days
Atlassian

CVE-2021-26072: The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attack…

Is it exploited?

Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .

VulnCheck KEV lists it since . It cites 1 public report, the first from .

How likely is exploitation in the next 30 days?
41.2%

EPSS score, percentile 98.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
Not scored

The CVE record carries no CVSS score.

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • before 5.8.6
  • before 5.8.6

Versions by product

Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

Description

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.

Source: CVE List, as of . About the data.

What to do

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Versions by product, as listed in the CVE record (2 products)
Atlassian Confluence Server
StatusVersions
Affectedbefore 5.8.6
Atlassian Confluence Data Center
StatusVersions
Affectedbefore 5.8.6

Source: CVE List, as of . About the data.

Timeline

DateEvent
CVE record published
CVE record last updated

References

1

Known exploited Atlassian vulnerabilities

  • CVE-2026-21589: Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability (added )
  • CVE-2021-26086: Atlassian Jira Server and Data Center Path Traversal Vulnerability (added )
  • CVE-2023-22527: Atlassian Confluence Data Center and Server Template Injection Vulnerability (added )
  • CVE-2023-22518: Atlassian Confluence Data Center and Server Improper Authorization Vulnerability (added )
  • CVE-2023-22515: Atlassian Confluence Data Center and Server Broken Access Control Vulnerability (added )