Home/CVE/The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attackers
CVE

CVE-2021-26072

The WidgetConnector plugin in Confluence Server and Confluence Data Center before version 5.8.6 allowed remote attackers

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.

MEDIUM · CVSS 4.3 EPSS 0.17549
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-918Server-Side Request Forgery (SSRF)
▤

Affected Products & Versions

2
atlassian confluence data center< 5.8.6
atlassian confluence server< 5.8.6
⚠

Public Exploits & PoCs

1
nucleiAtlassian Confluence < 5.8.6 - Server-Side Request Forgerymedium
◈

Detection Rules (IDS/IPS)

1
et-openET WEB_SPECIFIC_APPS Atlassian Confluence Server-Side Request Forgery (CVE-2021-26072)web-application-attack
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · security@atlassian.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Apr 2021 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://jira.atlassian.com/browse/CONFSERVER-61399Issue TrackingPatchVendor Advisory
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