CRITICAL CISA KEV

CVE-2021-26084

CVSS v3

9.8

CRITICAL

EPSS Score

94.4%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.

CISA Known Exploited Vulnerability

Date Added
11/3/2021
Patch Due Date
11/17/2021
Ransomware Use
Known

Technical details

Published
8/30/2021

Frequently asked questions

What is CVE-2021-26084?

In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.

Is CVE-2021-26084 actively exploited?

Yes. CVE-2021-26084 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 11/17/2021.

What is the CVSS score for CVE-2021-26084?

CVE-2021-26084 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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