CVE-2021-26072

Confluence Data Center vulnerability

CVSS

4.3

EPSS

38.8%

EPSS pct

98th

Exploited

No known

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.

Affected vendor

Atlassian

Affected product

Confluence Data Center

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness type (CWE)

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

Published

2021-04-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to low impact to confidentiality.

Its EPSS score of 38.8% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2021-26072

Confirm whether Atlassian Confluence Data Center is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-26072.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-26072

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-26072 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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