Atlassian Confluence Server and Data Center Object-Graph Navigation Language (OGNL) Injection Vulnerability

Critical Threat Advisory: This vulnerability is documented in active Ransomware campaigns. Immediate remediation required.

Technical Severity

CVSS v3.1 Metrics

CRITICAL

9.8 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

94.44 %

Predictive Probability

Percentile Rank

100.0 th

Documented as more likely to be exploited than 100.0% of known CVEs.

Detection Date

Nov 03, 2021

Remediation Due

Nov 17, 2021

CISA Catalog Active

Threat Analysis

Atlassian Confluence Server and Data Server contain an Object-Graph Navigation Language (OGNL) injection vulnerability that may allow an unauthenticated attacker to execute code.

Remediation Directive

Apply updates per vendor instructions.

Asset Context

Vendor Identity

Atlassian

Affected Product

Confluence Server and Data Center

Ransomware Status

Campaign Use Known

Weakness Classification

CWE-917

External Intelligence

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2021-26084